Everyone expected Caeleb Dressel to be one of the swimming stars of the Tokyo Games, and the American lived up to the hype on Thursday. 

Dressel started strongly and held off rival Kyle Chalmers of Australia at the end to win the 100m freestyle, the 24-year-old's first individual Olympic gold after taking two relay wins in Rio and one earlier this week.

The Floridian swam the 100m free three times in Rio and his time got worse from the preliminaries to the semi-finals to the final, ultimately leaving him sixth overall at 48.02 while Chalmers won gold with a 47.58.

This time, Dressel was at his best when it mattered most, posting a 47.02 to break an Olympic record that had stood since Beijing 2008.

Afterward, he described winning his first individual gold as a weight off his shoulders.

"It is different," Dressel said. "I didn't want to admit it but now that I did it, I can.

"It's a lot different – you can't rely on anyone else. It's just you and the water, there's no one there to bail you out. It's tough."

Winning the gold in a head-to-head showdown with the reigning champion made victory even sweeter.

"It's so fun going with Kyle – I mean, every time we make it good," Dressel said. "It's really fun to watch when we go head-to-head.

"I've got nothing but respect for him."

CROATIA'S ROWING BROTHERS GOLDEN AGAIN

Brothers Valent and Martin Sinkovic have teamed up to win a rowing medal for the third consecutive Olympics. 

The Croatians took gold in the men's coxless pair event at Sea Forest Waterway, leading throughout the race and winning by 1.29 seconds over Romania's Marius Cozmiuc and Ciprian Tudosa.

The Sinkovic siblings won gold in the double sculls five years ago in Rio after making up half of Croatia's quadruple sculls team that took the silver medal in London in 2012.

They are the first rowers to win gold in both the pair and double sculls since Canada's Kathleen Heddle and Marnie McBean did it in 1992 and 1996.

"It's an unbelievable feeling, hard to describe," said Valent, the older of the pair at 32. "This is like a new gold medal for us because it's in a second discipline, so we celebrate it like it's the first one for us.

"We couldn't be happier. Everything went as planned, we executed the race perfectly."

As for looking toward a potential fourth medal at Paris 2024, Martin Sinkovic said the brothers were done with pairs competitions but might look to row the four in three years' time. 

RIO POLE VAULT BRONZE MEDALLIST OUT WITH COVID

Sam Kendricks of the USA, the 2016 bronze medallist and 2017 world champion in the pole vault, has tested positive for COVID-19 and will not compete in Tokyo, the US Olympic and Paralympic Committee announced.

The USOPC said Kendricks has been transferred to a hotel and been placed in isolation in accordance with protocols.

"Sam is an incredible and accomplished member of Team USA and his presence will be missed," the USOPC said. "Out of respect for his privacy, we cannot provide more information at this time."

Earlier on Thursday in its daily media briefing, the International Olympic Committee said three athletes were among the 24 people who had come back positive for COVID-19 in the most recent round of testing.

STRAKA HAS CLUBHOUSE LEAD AS GOLF GETS UNDER WAY

Austria's Sepp Straka went out with the first grouping in the opening round of the men's golf tournament and set the pace for everyone who teed off behind him, taking the clubhouse lead with a 63 on Thursday morning.

Ranked 161st in the world this week after missing the cut at six of his last seven PGA Tour events, Straka turned in a bogey-free round at the Kasumigaseki Country Club, carding four birdies on the front nine and four more on the back.

Thomas Pieters of Belgium and Carlos Ortiz of Mexico finished with six-under-par 65s among the early starters to sit two back of the lead.

Several major winners including Rory McIlroy, Hideki Matsuyama and Collin Morikawa were still on the course.

AUSTRALIA OPEN RUGBY SEVENS DEFENCE WITH ROUT

Defending women's rugby sevens gold medallists Australia made a statement as they opened pool play with a crushing 48-0 defeat of hosts Japan after leading 24-0 at half-time.

Emma Tonegato got three tries while Demi Hayes and debutant Maddison Levi had two each for Australia, who face China later on Thursday.

"I definitely was concerned about this game," said Australia's head coach John Manenti. "Japan, playing at home, it would be very emotional for them and the pressures and expectations could have built on us.

"But I was really pleased with that clinical first half. We could relax at the end of the game and give a few of the girls debuts."

New Zealand, beaten finalists at Rio 2016, began their Tokyo campaign with a 29-7 win over Kenya.

REIGNING BMX GOLD MEDALLISTS ADVANCE TO SEMIS

BMX racers opened competition at Ariake Urban Sports Park, with defending gold medallist Connor Fields of the USA and current world number one Sylvain Andre of France among those booking their spots in the semi-finals.

Andre's countryman Joris Daudet had the top time of the day in his last run to make Friday's semis along with Rio 2016 bronze medallist Carlos Ramirez of Colombia.

On the women's side, world number one and Rio 2016 gold medallist Mariana Pajon of Colombia won all three of her preliminary races to advance, along with 2016 silver medallist Alise Willoughby of the USA.

Willoughby's team-mate Felecia Stancil turned in the best overall time of the day on her first run and also is one of the 16 semi-finalists.

Caeleb Dressel triumphed over rival Kyle Chalmers in one of the best races of Tokyo 2020, while China pulled off an upset to win an incredible women's 4x200m freestyle race in a world-record time.

Dressel was one of three competitors to set new Olympic benchmarks in the individual races at the Tokyo Aquatics Centre on Thursday, with Zhang Yufei and Zac Stubblety-Cook also doing so en route to winning gold.

There was glory for Dressel's United States team-mate in the men's 800m freestyle, too, where Bobby Finke topped the podium.

Here is a recap of all the goings-on from another enthralling session at the pool.

DRESSEL EDGES CHALMERS IN THRILLERS

Earlier this week, it was Australia beating the US in one of the races of the meet when Ariarne Titmus held off Katie Ledecky in the 400m free. 

This time it was glory for Team USA as Dressel won his second gold of the Games in an awesome 100m free final, with Australia's defending champion Chalmers just 0.10 seconds behind.

These two had battled before, with Chalmers entering the Games with two victories to one over the past five years, and the duo delivered an enthralling battle down the stretch.

But it was Dressel, part of the US team that won the 4x100m free relay earlier this week, who touched home in an Olympic record of 47.02 seconds.

TITMUS, LEDECKY BEATEN AS CHINA PULL OFF WR

Titmus has been one of the stars of these Games, pulling off a 200m and 400m free double. She and her previous record-holding Australia team-mates were favourites for gold in the 4x200m relay but had to settle for third in a race where each of the top three went under the previous world record time.

It was the foursome from China that pulled off the big win, leading from the first leg and holding on despite a frantic finish in which Ledecky so nearly anchored the United States to first place.

Ledecky fell narrowly short, though, as the US quartet took silver.

FINKE'S FINAL FLURRY

The opening race of the day produced a thrilling finish in the first men's 800m freestyle Olympics final, with Finke taking gold after turning on the jets late on.

Finke was seemingly not in contention after turning for the final 100m down in fifth and was still behind Germany's Florian Wellbrock, Italy's Gregorio Paltrinieri and Ukraine's Mykhailo Romanchuk on the turn for home.

But a sensational 26.39 split down the final stretch completed a stunning comeback to take gold for the United States ahead of Paltrinieri and Romanchuk.

NEW OLYMPIC RECORDS FOR ZHANG AND STUBBLETY-COOK

China's Zhang swam the third fastest time ever to take a dominant gold for China in the women's 200m butterfly.

Zhang hit the front early and never looked troubled en route to touching home first in a time of 2:03.86, a new Olympic record.

American duo Regan Smith and Hali Flickinger were second and third. Since 2012, the United States had landed a medal in every pool event bar the women's 200m butterfly, with this ending the longest medal drought in US swimming.

Stubblety-Cook took out the men's 200m breaststroke final thanks to a barnstorming last 50m.

The Australian moved into the top three at the 150m mark and powered home in a time of 2:06.38, beating Arno Kamminga and Matti Mattsson to top spot.

Japan remained top of the medal table at the Tokyo Olympics as they collected another three golds on day five.

Daiki Hashimoto, 19, was the standout performer as he secured a last-minute win in the men's all-around gymnastic final, with China's Ruoteng Xiao and the Russian Olympic Committee's pre-event favourite Nikita Nagornyy settling for silver and bronze.

That win took the host nation to 13 golds, with Chizuru Arai in the women's 70kg judo – their eighth medal in the sport at the Games so far – and Yui Ohashi in the women's 200m individual medley the other victors.

China pulled one clear of the United States as they also collected three golds on Wednesday. Shi Zhiyong broke his own world record to win the men's weightlifting 73kg event, while Wang Zongyuan and Xie Siyi brought China's third diving gold at the Games with victory in the men's synchronised 3m springboard final.

The USA had to settle for silver in China's diving win, though they did pick up gold in the debut 3-on-3 women's basketball event by defeating the Russian Olympic Committee.

Katie Ledecky and Erica Sullivan captured an American one-two in the women's 1500m freestyle meaning only Michael Phelps (13) has more individual Olympic success than Ledecky.

The Russian Olympic Committee remain fourth despite not winning gold on a frustrating day that saw them finish runners-up in both 3x3 basketball events and the men's 4x200m freestyle relay.

Australia enjoyed a memorable day in rowing as they battled to back-to-back golds in both the male and female coxless four, with Ariane Titmus setting a Games record in the women's 200m freestyle to move the Australians up to six golds.

Due to Australia's success on the water, Great Britain's dominant five-gold run in the men's coxless four that stretched back to Sydney 2000 came to an end, though they did collect a first silver medal in men's quad sculls.

Tom Dean, who won gold on Tuesday, was part of the men's 4x200m freestyle team that picked up Team GB's only gold of the day as they moved down to sixth place.

Fiji continued their Olympic men's rugby sevens dominance with a 27-12 win over New Zealand to retain the title they won at Rio 2016.

Their shorter-form rugby success represents their second gold in Games history, with Fiji's sevens team yet to lose at the Olympics after extending their unbeaten run to 12 games.

In April, COVID-19 forced the Fiji squad into isolation in the capital Suva before travelling to Australia in June for a pre-Games warm-up tournament.

Head coach Gareth Baber revealed some players, who had never been on a plane before nor played at an elite level, had not seen their families in "nearly 20 weeks".

"We locked them down for five months, basically," Baber said. "They came into a training camp on Easter Monday thinking they were going back on the Friday, and on the Tuesday they were told they couldn't go back and haven’t seen their families since. That takes a special kind of person to make that commitment.

"We were effectively locked up in a Christian hostel. We built a gym, basically in the garage of the hostel, and we were there for about 12 weeks.

"In fact, when the players go back and do their quarantine, it will have been about 20 weeks since they were last with their families."

Gold medal winner Asaeli Tuivuaka, whose try sealed the all-important final win, also spoke of the sacrifices involved for the sevens success.

"This gold medal is special to me. Back at home, their sacrifice and prayer motivated me through everything," Tuivuaka said. "I did not see them, only spoke to them on the phone, and that’s why it is meaningful to me.

"I have not seen my family for months. They are praying for me, they give me a lot of encouragement to keep on moving forward so that I can be here today.

Runners-up New Zealand claimed their first medal in a men's rugby event at the Games, though Great Britain lost out to Argentina, who claimed their first medal of the Olympics, for bronze.

ZHIYONG BREAKS OWN WORLD RECORD

China's Shi Zhiyong broke his own world record to secure gold in the men's 73kg weightlifting event.

The three-time world champion becomes the second weightlifter, after Waldemar Baszanowski in 1964 and 1968, to win back-to-back titles at the Games in the lightweight category, given his previous gold in the 69kg at Rio 2016.

"I prepared five years for Olympics so I really want to perform at the best," Zhiyong explained in Mandarin. "So if I didn't make to break my own record, just a gold medal, I would feel regret.

"I want myself to break the record in the Olympics... Even though I didn't make the 192kg [on my first attempt], I am still confident that I'm pretty sure I’m going to break my record so I did the 198."

A 166kg lift in the snatch achieved an Olympic record before a 198kg clean and jerk took his total to 364kg – one kilo more than his previous world record.

HASHIMOTO CONTINUES JAPAN'S GYMNASTIC DOMINANCE

Daiki Hashimoto captured a third straight men's gymnastics all-around title for Japan as he followed up Kohei Uchimura's back-to-back victories at London 2012 and Rio 2016.

Across all six events, the 19-year-old totalled 88.465 to win gold by a whisker, with China's Ruoteng Xiao and Russia's pre-event favourite Nikita Nagornyy, the reigning world and European champions, winning silver and bronze respectively.

Hashimoto, who could only manage third behind Nagornyy's Russians in the team event on Monday, was in third again before a near-flawless routine gained 14.993 points to put him top.

Japan also claimed more gold in judo as Chizuru Arai defeated Austria's Michaela Polleres to bring the host nation its eighth judo medal of the Games so far.

LATVIA AND USA CLAIM FIRST EVER 3X3 BASKETBALL TITLES

The United States dictated proceedings throughout the five-day women's tournament, winning nine games and losing only one as they etched their names in basketball history with the first ever 3x3 Olympic basketball triumph.

Stefanie Dolson, Allisha Gray, Kelsey Plum and Jackie Young did the hard yards early before securing an 18-5 victory over the Russian Olympic Committee in the debut of 3-on-3 basketball at the Games.

In the men's edition, Latvia were the first winners as Karlis Lasmanis' two-point shot with 28 seconds left clinched a 21-18 win over the Russian Olympic Committee.

Though, basketball fanatics feel the real winner of the three-aside debut event is the sport itself.

"I think it's going to keep growing," the USA coach Kara Lawson said. "I think it's got a great future around the world, it's a lot of fun to play. Being an Olympic sport now, there's more converts probably than we've ever seen before."

SOUTH KOREA'S KIM MAKES EMPHATIC RETURN

Fencer Kim Jung-Hwan won gold at London 2012 but quit the sport before making a comeback from retirement in 2019.

After taking bronze in the men's individual sabre on Saturday, the 37-year-old may have felt fate would not be on his side.

However, Kim was part of South Korea's team that won the men's sabre on Wednesday as they coasted past Italy 45-26 in a one-sided final to defend their London 2012 title - after the discipline did not feature at Rio 2016.

Kim also becomes the first Asian fencer to claim four Olympic medals in the field, while Italy's silver medal reflected a record-extending 21st Olympic medal in the men's team sabre event.

Real Madrid winger Takefusa Kubo was on target again as hosts Japan eliminated France from the Tokyo Olympics men's football tournament with a 4-0 win on Wednesday.

Kubo netted in Japan's first two Group A games and gave Madrid another reminder of his quality by opening the scoring against France in Yokohama.

In doing so, the 20-year-old became the first Japanese player to score in each group-stage match at the same Olympic tournament.

Hiroki Sakai doubled Japan's lead prior to half-time before Koji Miyoshi and Daizen Maeda completed the rout, either side of Randal Kolo Muani being sent off.

Japan advance as the only side with a 100 per cent record, whereas France – who had Timothee Pembele and Andre-Pierre Gignac in their line-up – are out at the first stage.

Only Fiji (23 in 2016) and Serbia-Montenegro (14 in 2004) have let in more than the 11 goals France conceded at Tokyo 2020 in the 21st century.

"The tournament was really difficult for us, because we are young players and these are the first games we have played with the team," France midfielder Alexis Beka Beka said. 

"One of the big differences was the other teams knew each other much better. But it's all about the details. The game is never finished."

Mexico recovered from their loss to Japan last time out by beating South Africa 3-0 in a game in which both sides had a player sent off, seeing them through in second place ahead of France.

SPAIN MATCH CLASS OF '92

Spain were not perfect in the pool phase, having been held for the second time in three games in Wednesday's clash with Argentina, but they still went through as Group C winners.

It is the first time La Roja have achieved that feat at the Olympic Games since the likes of Pep Guardiola and Luis Enrique went on to win gold in Barcelona in 1992.

Spain dominated possession against Argentina and took the lead through Mikel Merino's 66th-minute strike at Saitama Stadium.

Tomas Belmonte's late equaliser came against the run of play, but it was not enough to prevent 2004 and 2008 gold medallists Argentina crashing out early on.

London 2012 quarter-finalists Egypt finished level on four points with Argentina after beating Australia 2-0 and progress to the last eight, where heavyweights Brazil await, by virtue of a superior goal difference.

HISTORIC ACHIEVEMENT FOR OLYWHITES

New Zealand picked up the point they needed against Romania in a goalless draw to advance to the quarter-finals of the competition for the first time.

Goalkeeper Michael Woud redeemed himself for his horror show in the loss to Honduras by making a string of stops against Romania, who would have advanced with a win.

"It really came down to desire tonight," said OlyWhites head coach Danny Hay. "The boys really dug deep and showed a lot of that.

"I'm really proud of the performance. It's historic and we look forward to a quarter-final for a New Zealand men's team."

New Zealand also needed a favour from South Korea, who followed up a 4-0 win against Romania with a 6-0 victory over Honduras on Wednesday en route to topping Group B.

Hwang Ui-jo scored three of the goals, two of those from the penalty spot, and a showdown with Mexico is up next for rampant South Korea for a place in the semi-finals.

RIO FINALISTS GERMANY FALL SHORT

Germany will not get the opportunity to match or better their silver medal from Rio in 2016 as a 1-1 draw with Ivory Coast saw their opponents through at their expense.

Nothing less than a win would do for Stefan Kuntz's men but they fell behind to a Benjamin Henrichs own goal with 67 minutes played.

While Eduard Lowen's impressive free-kick did set up a tense finish in Miyagi, Germany were unable to find a winner and are on the plane home.

Ivory Coast will now take on Spain, the last European nation standing, in the quarter-finals.

Also through to the knockout stage are reigning champions Brazil after seeing off Saudi Arabia 3-1, with Richarlison's late double adding to Matheus Cunha's first-half opener.

Novak Djokovic has welcomed the International Tennis Federation's (ITF) decision to delay the start of matches until 3:00pm (local time) at the Tokyo Olympics on Thursday.

The world number one has cruised through to the quarter-finals, where he will meet home favourite Kei Nishikori, but he – along with many others – had complained of heat and humidity causing problems due to contests starting too early.

That decision has come after world number two Daniil Medvedev struggled with conditions as he was forced to use two medical timeouts on Wednesday to cope with the heat and subsequently asked chair umpire Carlos Ramos, per ESPN, "If I die, are you going to be responsible?"

The pushback now means the majority of the games in the closing stages will be played in slightly cooler conditions in order to protect player welfare amid growing health concerns.

Speaking after a 6-3 6-4 mixed doubles win with Nina Stojanovic against Brazil's Luisa Stefani and Marcelo Melo, the Serbian expressed gratitude for the ITF's decision, though he felt it should have come earlier.

"It was nice news to receive," Djokovic said. "It's better than starting at 11:00am. It's not just in my opinion. I've spoken to six out of eight quarter-finalists in men's singles and everyone is in favour of starting later because the conditions are really brutal.

"It's very good [news] because you don't want to see situations like what we saw today with Paula Badosa [who retired after the first set].

"I've played tennis now professionally for 20 years, and I've never faced these kind of conditions in my entire life on a consecutive daily basis.

"I did experience certain similar days, one day in Miami or New York, or sometimes it happens here and there, but it's one or two days, and then it passes. Here is every single day. So, it's really draining players' energy, and you just don't feel yourself."

After gymnast Simone Biles' withdrawal to protect her mental health, Djokovic outlined the pressures that come with professional sport, too.

"Pressure is a privilege, my friend. Without pressure, there is no professional sport," he continued.

"If you are aiming to be at the top of the game, you better start learning how to deal with pressure and how to cope with those moments on the court, but also off the court.

"I've developed the mechanism on how to deal with it in such a way that it will not pose a distraction to me. It will not wear me down. I feel I have enough experience to know myself how to step on the court and play my best tennis.”

Djokovic, who was unsure if he had ever played in an "official" mixed doubles competition, and Stojanovic will now face Germany's Laura Siegemund and Kevin Krawietz in the quarter-final.

Despite limited experience, the six-time Wimbledon winner enjoyed the outing and was surprised how quickly he and Stojanovic understood each other's games.

"We did not chat about the tactics too much," the 34-year-old added. "We know each other, but we've never really played in the opposite ends of the net, or the same side of the net, so it was amazing how well we clicked from the beginning."

"It's time to start looking like Team USA." That was the approach after a shock opening Olympics loss, Damian Lillard said, and the Games favourites delivered on Wednesday.

France had upset the United States in their first game, following up a 2019 FIBA Basketball World Cup quarter-final triumph against the same opponents.

It was a defeat that will ensure doubts remain about Team USA's title aspirations for some time, but they at least got back to winning ways against modest opponents in Iran.

Lillard led the way in Wednesday's stand-out game, scoring 21 points in a dominant 120-66 success.

"I think after our loss to France we had two days between games and everybody just wanted to get back out there and get right," the Portland Trail Blazers guard said. "After that loss, we came together."

Lillard added of the Iran game: "I think we came out with a lot more urgency. Our energy was higher, we played at a faster pace. We were more aggressive, and we played like ourselves.

"We didn't come out here and think that it was just going to happen; we made it happen, and that's the way that we've got to play if we want to be successful in these Olympics."

'WE DON'T NEED HEROES'

Lillard's game-high tally – consisting entirely of seven three-pointers – was still significantly down on the 28.8 he averaged in the 2020-21 NBA regular season.

But that is exactly what coach Gregg Popovich wants from his team, knowing Devin Booker (16 points on Wednesday, 25.6 in the NBA), Jayson Tatum (14, 26.4), Zach LaVine (13, 27.4), Kevin Durant (10, 26.9) and Khris Middleton (10, 20.4) cannot all be the main men.

"Each of these guys scores 20 or 25 or 30 for their teams, and their teams depend on that every night," Popovich said. "We can't play like that, and so we don't.

"They appreciate each other and they know what their team-mates can do. They understand that good basketball is sharing the basketball.

"Everybody's, in a sense, kind of a role player now. We don't need heroes."

FRANCE TAKE TOP SPOT

Les Bleus built on their victory over Team USA and will now top Pool A ahead of the American side thanks to a 97-77 defeat of the Czech Republic.

France trailed 28-22 through the first quarter but turned the game around with a dominant second, settled 29-12 in their favour.

As against the United States, Evan Fournier topped the scoring charts, weighing in with 21 points on 62 per cent shooting.

BOOMERS BIGS WIN BATTLE

Australia also have two wins from two after edging Italy 86-83 on Wednesday, led by the frontcourt contributions of Jock Landale and Aron Baynes.

Landale led the Boomers with 18 points, but the pair crucially also finished with seven rebounds and a block apiece. Between them, they accounted for nine of the team's 16 vital offensive rebounds – Nick Kay added another four from the bench.

"Our bigs were huge today," said Utah Jazz wing Joe Ingles. "The rebounds, tip-outs – they got us a ton of extra possessions."

Elsewhere in Pool B, Nigeria's pre-tournament optimism might have given way after a second straight defeat that gives them a mountain to climb.

D'Tigers beat Team USA and Argentina in exhibitions but lost to Australia and then, on Wednesday, Germany – a 99-92 reverse despite 33 points from Jordan Nwora, fresh from playing a fringe role in the Milwaukee Bucks' run to the NBA title, including one minute and three points in the Finals.

Sena Irie made boxing history for Japan and Kurt Walker produced a huge upset by ending Mirazizbek Mirzakhalilov's bid to win gold at the Tokyo Olympics on Wednesday.

Featherweight Irie became the first woman to win an Olympic boxing medal with a points victory over Maria Claudia Nechita at the Kokugikan Arena in her homeland.

Irish featherweight Walker eliminated world champion and top seed Mirzakhalilov of Uzbekistan in the round of 16, claiming a split decision.

We take a look at the pick of the action in the ring.

IRIE WANTS JAPANESE WOMEN TO SWAP JUDO FOR BOXING

The 20-year-old Irie will win at least a bronze medal after her defeat of Nechita and faces Team GB's Karriss Artingstall, who edged out Skye Nicolson of Australia, at the semi-final stage.

Irie hopes her exploits will inspire Japanese women to pick boxing over judo.

"Judo is a much more famous sport in Japan so I hope this makes boxing a lot more famous and inspires more Japanese women to take it up," she said.

"I've shown other women who might not be good at sport that you can achieve something if you work hard.

"This medal is the result of 13 years' hard work. I've made history but it is still just a little contribution. I want to do more. Winning gold would be so much bigger."

KURT WALKING TALL 

Walker produced the performance of his career to eliminate Mirzakhalilov.

Mirzakhalilov was strongly fancied to take gold, but Walker had other ideas as he pulled off a shock victory.

The 26-year-old said: "I'm over the moon. I really can't explain it, but I worked on it and I knew it was going to happen. I believed. I knew. I'm not surprised. 

"It's just brilliant. I never would have thought it before I came, it's a fairytale. But there is still more work for me to do. I need to recover, go back and get more tactics and hopefully get a medal."

Asked how he ranks the win, he said: "The best I'd say. I beat the current world champion, the number one seed, in the Olympics Games, the biggest stage of the lot."

Duke Ragan will be Walker's quarter-final opponent on Sunday after the American dominated Serik Temirzhanov of Kazakhstan.

FONTIJN: PRICE NOT IN MY HEAD

Nouchka Fontijn and top seed Lauren Price could be on a middleweight semi-final collision course after securing midweek victories.

Fontijn of the Netherlands beat Pole Elzbieta Wojcik in the first round, while Price got her quest for Olympic glory by dominating Mongolia's Myagmarjargal Munkhbat.

Dutch boxer Nouchka thought she had won the world title in 2019, but Price took the title in Russia after the British team launched a successful appeal.

The two will meet it again if they come through their quarter-final bouts this weekend and Fontijn says Price is not in her head.

"I’m not busy with Lauren Price any more than other opponents," said the Rio 2016 silver medallist. "Some people think I need revenge and that she's always in my head and that's not true. I am just working towards my next fight and we'll see what happens then.

"I've already got the silver, and gold would be perfect in my collection. But every Olympic Games is another chapter and it’s been five years since Rio. There's a whole new squad of opponents, so it’s a different story."

Daniil Medvedev did not take kindly to a question over the controversy surrounding Russian athletes at the Tokyo Olympics after he battled through sweltering conditions to reach the quarter-finals.

Medvedev beat Italy's Fabio Fognini 6-2 3-6 6-2 on Wednesday in a match that was paused for 10 minutes due to on-court temperatures reaching 31 degrees Celsius, with humidity then adding to that.

The world number two had to receive medical attention on two occasions before he prevailed to tee up a last-eight tie with Pablo Carreno Busta of Spain.

Top seed Novak Djokovic continued his march towards the medal matches with a routine win over Alejandro Davidovich Fokina, though in the doubles, Andy Murray's hopes of winning a historic fourth Olympic prize were shattered.

MEDVDEV'S TEMPER FRAYS IN THE HEAT

It had already been a stressful day for Medvedev. The 25-year-old replied "I can finish the match but I can die. If I die, are you going to be responsible?" when asked by chair umpire Carlos Ramos whether he could carry on playing against Fognini following two medical timeouts. 

Medvedev's temper then boiled over in the media mixed zone when he was questioned over the contentious nature of Russian athletes competing at the Games.

The Russian flag is not represented in Tokyo due to sanctions against the country for state-sponsored doping offences. Russia is suspended from competing in global sporting events for two years – a ban that was reduced from an initial four-year punishment. Instead, athletes are competing under the banner of the Russian Olympic Committee (ROC).

Medvedev was asked if he feels the Russian athletes are "carrying a stigma of cheaters".

Seemingly misunderstanding the question, Medvedev hardly held back in his reaction, saying: "That's the first time in my life I’m not gonna answer a question, man. And you should be embarrassed of yourself."

Before leaving the room, Medvedev subsequently told the press officer: "I think you should [remove] him from either the Olympic Games, either the tennis tournament. I don't wanna see him again in my interviews. Thanks."

MURRAY'S PARIS PARTICIPATION IN DOUBT

There was to be no fairytale title tilt for former world number one Murray. He won gold in the singles in London and Rio, and also managed a silver medal at the 2012 Games in the mixed doubles, but he and Joe Sailsbury suffered a defeat to Croatian pair Marin Cilic and Ivan Dodig in the quarter-finals.

The British pair won the first set but failed to make their advantage count, with Croatia's duo coming back to win 4-6 7-6 (7-2) 10-7.

Murray will be 37 by the time the Paris Games come around, and as he continues to carefully manage his return from hip surgery, the Scot could well have made his Olympic farewell.

"I don't know. I don't know if I'll get the opportunity to play [in the Olympics] again," he conceded.

"I love every minute of playing the Olympics. I wish that today would have gone differently. I had another chance with Joe to win a medal. We were so close and that is just disappointing. There was some stuff I wish I could have done at the end of the match to try and help out more. But yeah, very disappointing."

MIXED BAG FOR TSITSIPAS

While Medvedev, Djokovic and Alexander Zverev all progressed into the last eight in the singles, there was no place for Stefanos Tsitsipas, whose hopes were ended by Ugo Humbert.

The Greek world number four suffered a seemingly innocuous leg injury in the second set tie-break and failed to recover in the decider as Frenchman Humbert claimed the biggest win of his career.

However, Tsitsipas was swiftly back on court to play in the mixed doubles alongside partner Maria Sakkari, and the duo claimed a comfortable 6-3 6-4 victory over Canada's Gabriela Dabrowski and Felix Auger-Aliassime.

Asked after that win to discuss what went wrong in his earlier defeat, Tsitsipas replied: "I figured out a few things later during the match, like really, really late. 

"I think if I've had the same mindset or the same attitude, same vision that I had towards the very end of the match, I think things would have gone much, much smoother and better for me. It's something that I learned."

He also confirmed his injury was "nothing serious."

DJOKOVIC ON A ROLL

As expected, Djokovic is one win away from a shot at a medal in the singles, and he then followed up his victory over Davidovich Fokina by combining with Nina Stojanovic in the mixed doubles.

The Serbian pair beat Marcelo Melo and Luisa Stefani of Brazil 6-3 6-4 in just 70 minutes to book their place in the next round.

Djokovic will have the host nation against him in his next match, however, as he takes on Kei Nishikori, who is Japan's only hope of a singles medal after Naomi Osaka's exit.

The International Tennis Federation (ITF) has confirmed matches at the Tokyo Olympics will now start later in the day after concerns over player health and welfare.

World numbers one and two Novak Djokovic and Daniil Medvedev have been among the players to complain about games starting too early in the day, citing the heat and humidity at Ariake Tennis Park as a major issue.

Indeed, on Wednesday, 25-year-old Medvedev struggled with the conditions as he battled to a 6-2 3-6 6-2 win over Fabio Fognini.

Despite being allowed 10 minutes off court at one stage, Medvedev was in visible discomfort during the last-16 tie, and had two medical timeouts before being asked by chair umpire Carlos Ramos whether he could continue.

"I can finish the match but I can die," the Russian replied to Ramos, per ESPN. "If I die, are you going to be responsible?"

The 72 per cent humidity meant 31 degrees Celsius felt like 37 degrees Celsius on the heat index. Medvedev was not the only player to suffer on Wednesday, with Paula Badosa having to be taken from the court in a wheelchair as she retired against Marketa Vondrousova due to heatstroke.

Earlier in the week, Medvedev had questioned the approach of starting matches in the late morning, while top seed Djokovic suggested scheduling the first games for 15:00 local time.

The ITF has now agreed, with start times pushed back to 15:00, meaning the majority of matches in the closing stages of the Olympic tennis will be played during the slightly cooler evening hours.

"In the interests of player health and welfare and following extensive consultation, the ITF has announced a change of schedule due to the increasing heat and humidity currently being experienced in Tokyo," an ITF statement read.

"The decision to start matches at 3pm JST from Thursday is possible due to the outcomes of today’s matches across the five competitons being staged and the size of the player field.

"[The decision] is designed to further safeguard player health."

Primoz Roglic eased to an emphatic time trial victory to clinch gold at the Tokyo Olympics, claiming Slovenia's first gold medal in any cycling discipline.

Roglic was pipped to the post in the 2020 Tour de France, when compatriot Tadej Pogacar stole a march on him in the final time trial.

The Jumbo-Visma rider's attempts to wrest the title away from Pogacar proved fruitless this year, as he suffered a huge crash early on in the race and was eventually forced to abandon.

He did not make the podium in Saturday's road race, Pogacar taking that honour for Slovenia, but Roglic hit back with a supreme display on Wednesday.

The 31-year-old finished the 44.2km course in a time of 55:04, more than a minute ahead of his nearest rival, Tom Dumoulin of the Netherlands.

Roglic was never out of the top two. He led by 0.04 seconds after 15km, yet had dragged that lead out to 42.34 seconds at the 37km time check.

Rohan Dennis got the bronze, becoming the second Australian to win a medal in both road and track cycling, after Kathy Watt in 1992.

Dumoulin, a Jumbo-Visma team-mate of Roglic, became the first Dutchman to win two Olympic medals on the road, following his time trial silver in Rio.

Pre-event favourite Wout van Aert of Belgium was unable to keep the pace and finished down in sixth, while world TT champion Filippo Ganna had to settle for fifth.

TWO UP FOR SLOVENIA

Pogacar decided not to push himself for Wednesday's event, making Roglic Slovenia's hope, and he certainly delivered with what was a brilliant display of power.

Roglic's gold was Slovenia's first in cycling and the European nation's second at these Games, following Benjamin Savsek's success in the men's canoe slalom on Monday, equalling their best tally at a Games, which came in Sydney 21 years ago.

Dumoulin's silver, meanwhile, brought up the Netherlands' seventh medal of Wednesday. It has equalled their most successful single day (August 11, 1928) at a Games.

Team GB's two-time gold medallist Geraint Thomas finished 12th, capping a frustrating week after he crashed out of the road race.

"It was tough," the Welshman told BBC Sport. "I tried to start at a pace that we thought would be there or thereabouts for a medal. Then I heard I was 50 seconds down on Roglic which wasn't great for morale.

"It's been a super hard five weeks and it just seems to be one thing after the next. I just need to stay positive and try to keep going."

VAN VLEUTEN GETS GOLD, VAN DER BREGGEN GOES OUT ON A HIGH

Two of Dumoulin's countrywomen contributed to the Netherlands' medal count on Wednesday, with Annemiek van Vleuten finally claiming gold.

The 38-year-old thought she had won the road race on Saturday, but was mistaken. However, there was no such error on this occasion, as she won by over a minute on the 22.1km course.

She is the third-oldest woman to win an Olympic gold for the Netherlands, after dressage rider Anky van Grunsven (aged 40 years, 230 days) and rower Marit van Eupen (38y, 326d), with that duo winning in Beijing in 2008.

After her silver medal on Saturday, Van Vleuten is the sixth female cyclist to claim a podium place in the road race and the individual time trial at the Games.

Dutch cyclist Annemiek van Vleuten finally has an Olympic gold medal after obliterating the field in the time trial.

She won by nearly a minute over the 22.1km course, with Switzerland's Marlen Reusser in silver and Van Vleuten's team-mate Anna van der Breggen claiming the bronze.

Marlen Reusser of Switzerland finished second, while Anna van der Breggen boosted the Netherlands' count with a bronze – her third Olympic medal.

A surprised Van der Breggen was initially disappointed with her effort, but it was enough to ensure the Netherlands claimed multiple medals in a cycling event at the Games for the first time.

"There's not so much of a story. The time trial did not feel so good. It was not my best time trial. I thought it was nothing, and in the end it was a bronze medal, so I'm really happy to have a medal," she said.

The medal caps off a stellar career for Van der Breggen, who is retiring at the end of the season.

"A bronze medal is a great way to finish this all. It's my third Olympic medal and that makes me proud," she added. "I can look back on many great races and on a great career."

Paula Badosa was forced to withdraw from her quarter-final against Marketa Vondrousova and taken from the court on a wheelchair after suffering from heatstroke at Tokyo 2020.

Tuesday saw heavy downpours in the Japanese capital, but the hot and humid conditions from earlier in the week returned early on Wednesday with temperatures at times going above 30 degrees Celsius.

Vondrousova, who had shocked home favourite Naomi Osaka in the previous round, won the first set 6-3 at Ariake Tennis Park but her opponent was clearly struggling as she prepared to play the second set.

She required medical assistance to depart the court, as Vondrousova progressed to the final four.

VONDROUSOVA COMMENTS ON THE HEAT

The conditions for the tennis in Tokyo have been a quite literal hot topic with both Daniil Medvedev and Novak Djokovic stating matches should start at 3pm so the majority can be played as temperatures cool.

Vondrousova explained how it was playing in the searing heat, saying: "It was a big struggle from the beginning.

"I warmed up in the morning and I felt it was really hot and humid. Also, I was a bit tired from yesterday because I had doubles too.

"But I knew she had too [singles and doubles]. I felt like we both were struggling from the beginning.

"I was just thinking, you have to stay there mentally, just fight for every point and just see what happens. It's good for me that I can have some rest now.

"It's all about the head too. You have to stay there mentally and fight. Even when you lose the point, you have to get up and fight again. It's really a struggle here with the weather, but that's it, we have to fight."

OLYMPICS LIKE A SLAM FOR SVITOLINA

Next up for Vondrousova is a last-four meeting with Elina Svitolina, the fourth seed and highest-ranked player left in the women's draw.

The Ukrainian was a 6-4 6-4 victor over Camila Giorgi and talked up the significance of winning Olympic gold.

"I know that for Ukraine, [the Olympics] is a really big thing," Svitolina said. 

"I value the Olympics as a grand slam, and I tried to prepare to bring my best tennis. Here I am in the semi-final, and I can get a chance to get a medal. It's very special for me, but I try to take one match at a time."

Belinda Bencic (9) came through 6-0 3-6 6-3 against Anastasia Pavlyuchenkova on the other side of the draw. She will face Elena Rybakina (15), who was too good for seventh seed Garbine Muguruza in a 7-5 6-1 win.

Ash Barty was beaten along with partner Storm Sanders in the women's doubles quarter-finals earlier on Wednesday but the world number one bounced back to win her first-round mixed doubles match with partner John Peers.

The Australian duo beat Argentina's Horacio Zeballos and Nadia Podoroska 6-1 7-6 (7-3).

Daniil Medvedev told the chair umpire "I can finish the match but I can die" as he struggled with the suffocating heat at Tokyo 2020.

A 6-2 3-6 6-2 win over Fabio Fognini on Wednesday was enough to see Medvedev through to the last eight at Ariake Tennis Park.

But the world number two struggled with 72 per cent humidity that meant an already hot 31 degrees Celsius felt like 37 degrees Celsius on the heat index.

An extreme heat rule meant Medvedev and Fognini were allowed to leave the court for 10 minutes at one stage of the contest.

Medvedev was in visible discomfort before serving, between points and at changeovers. 

He had two medical timeouts before being asked by the chair umpire Carlos Ramos whether he could continue.

"I can finish the match but I can die," the Russian replied to Ramos, per ESPN. "If I die, are you going to be responsible?"

After the match, Medvedev – who along with Novak Djokovic has been vocally calling for matches to start later in the day to counteract the heat – described his struggles.

He said: "Even from the first set, I didn't feel good enough with my breathing. That's why I called the physio. I felt like my diaphragm had blocked. 

"I couldn't breathe properly. I think it was the most humid day we have had so far.

"Then, on the second set, I just had darkness in my eyes, like between every point I didn't know what to do to feel better. 

"I was bending over, and I couldn't get my breathing together. I was ready to just fall down on the court.  

"I knew there was a 10-minute break. So I went under the cold, freezing shower.

"When you have such a change of temperature and go out on the hot court, you can fully cramp, and it finishes the match for you, either that or you feel better. I was lucky I felt better.

"I don't care too much [about closing the roof], to be honest because I don't know if they have AC [air-conditioning]. 

"It can be actually more humid and hot when they close it, but they should start the matches later. I said it in the first round, and I'll continue saying it.

"All the players I know said this is not normal to start at 11am [local time]. 

"[Djokovic] went to ITF and talked to them, and they gave him reasons - I heard maybe from tomorrow they're going to change it, but let's see."

Following the Medvedev match, organisers were quoted as saying they were "considering" making a change, starting from Thursday's action.

Paula Badosa also struggled on Wednesday and ultimately had to leave the court in a wheelchair after retiring with heatstroke from her quarter-final match against Marketa Vondrousova. 

The Spaniard also withdrew from her mixed doubles match later alongside Pablo Carreno Busta, ending their hopes.

Carreno Busta is still in the singles and will face Medvedev next.

Vondrousova, who had won the first set before her opponent withdrew, said: "It was a big struggle from the beginning because I warmed up in the morning and I felt it was really hot and humid.

"Also, I was a bit tired from Monday because I had doubles too. But I knew [Badosa] had [played singles and doubles] too. 

"I felt like we both were struggling from the beginning. I was just thinking, you have to stay there mentally, just fight for every point and just see what happens."

Netherlands' Annemiek van Vleuten finally ended her hunt for an Olympic gold as the 38-year-old triumphed in the women's time trial on Wednesday.

Van Vleuten's confusion in the road race made headlines over the weekend as she celebrated when crossing the line in second place, thinking she had won.

However, it was Anna Kiesenhofer – who is currently without a professional team – who triumphed, having forged a breakaway with 40 kilometres remaining; Van Vleuten failing to realise the Austrian had finished well ahead.

Yet Van Vleuten, who looked set to win gold in Rio only to crash out on the final approach, finally clinched the top prize, and despite her veteran status, she is determined to push for more.

"I think it will sink in tonight maybe, not at the moment," said Van Vleuten, who became the second Dutch cyclist to win the individual time trial at the Games, after Leontien van Moorsel in 2000 and 2004.

"My story started in Rio but the story has not ended yet, because I will not stop. But this is really beautiful. It makes it extra beautiful... extra beautiful."

She also insisted she never lost faith in her ability, despite her troubles.

"I knew after the road race that I was in really good shape, and no one believed. They were talking about different stuff but not about my performance, but in my heart I knew that my preparation had been optimal and that I was in really good shape here," Van Vleuten added.

"If you know that you're really close to the gold sometimes you tend to think only about the mistakes you can make on this quite technical course, about the corners, about if it starts to rain or it's slippery, or that you make a mistake.

"But I was in a good flow today and I was not thinking about mistakes. I was turning it around, like, 'Where can I gain time?'"

Van Vleuten, at the age of 38 years and 293 days, is the third-oldest women to win Olympic gold for the Netherlands.

She finished ahead of Marlen Reusser and compatriot Anna van der Breggen, who equalled Van Moorsel as the Dutch cyclist with the most Olympic medals (three).

Kevin Durant feels the key to the United States' confidence-boosting win over Iran at the Tokyo Olympics was down to becoming more selfish and playing with freedom.

Team USA's 25-game winning run in the men's basketball at the Games was ended by France last week but they responded with a 120-66 victory against Iran on Wednesday.

That loss to France followed exhibition defeats to Australia and Nigeria in the build-up to the event, leading to questions over the cohesion of the record 15-time gold medallists.

But Gregg Popovich's side answered those critics against Iran with a comprehensive victory in which they played fast, aggressive basketball throughout.

Damian Lillard, one of those to come in for heavy criticism following the opening-game defeat, top-scored with 21 points, all from beyond the arc.

USA knocked down 19 3-pointers and 22 of their 37 shots (62 per cent) inside the arc as they showed signs of the quality that has taken them to three successive gold medals.

Brooklyn Nets forward Durant insists the chemistry of the side was never in question as he highlighted the changes made between matches.

"After a tough loss last game, today we came out with more freedom as individuals and took the shots that we normally like to take," Durant said.

"They went in tonight, and we guarded up, so it was a good step.

"I felt like we were in sync last game, but like I've been saying, it's a make or miss game today.

"We created good shots last game and I think today it's the continuity of what we've been doing over the last week. We finally capitalised on the stuff that we've been working on.

"Like I said, our chemistry has been great since day one. We're all excited to be here, I mean this is the Olympics, this is the national team. 

"But I think we were a bit too unselfish early on and tried not to step on toes. That bit us before.

"Tonight the guys came out there and were super aggressive to look for their shot but also keep everybody involved, and we were able to make some shots. 

"Damian came out, got it scorching for us, so we're going to need that going forward."

Head coach Popovich rotated his roster against Iran by bringing in Jrue Holiday and Devin Booker, who were brought off the bench against France.

"In the last game we have to play two 'bigs' and I think that might have clogged it up a bit for us all offensively," Durant added.  

"Defensively we've been solid the whole time, but offensively we were trying to find our rhythm. 

"I played the four [position], so I was able to stretch the floor a bit and give guys space and we were able to get some confidence and knock some shots down."

A victory over the Czech Republic on Saturday will guarantee the world's top-ranked side a place in the quarter-finals.

That next match will also provide Durant with his next opportunity to surpass Carmelo Anthony as USA men's basketball all-time Olympic top scorer.

Durant managed 10 points against Iran, moving him to within five of Antony's record (336).