Denmark were perhaps fortunate to progress to the men's team pursuit final after Frederik Madsen crashed into the back of Great Britain's Charlie Tanfield in the closing kilometre.

The Danes, who were over two seconds ahead of their opponents, were easing to victory in the heats until lead rider Madsen inexplicably smashed into Tanfield, meaning just two riders from each side crossed the finish line.

The crash prompted an angry response from Madsen and left both teams awaiting further judgement from the officials, with Denmark claiming they had made the catch before the collision.

The UCI deliberated before confirming Denmark's place in the final, as race officials felt a successful catch – deemed to be made by a team of three when they are within one metre of the other team's last rider – had been completed.

The crash capped an eventful day in cycling, with Tanfield serving as a late replacement for Ed Clancy, who retired on Tuesday with a back injury, amid a row over Denmark's illegal equipment from Monday's qualifying session.

Prior to Tuesday's meeting, British Cycling performance director Stephen Park further fuelled the grudge match by confirming Britain were one of "several" teams calling for the Danes to be disqualified due to their use of plastering on shins to improve aerodynamics.

Madsen, speaking after the crash, explained how the unexpected collision happened and also defended against the allegations of unfair equipment use.

I knew that there was a GB guy. I didn't know if he was the third man or the fourth one, or first or second man. Suddenly he was just in front of me, and I couldn't react," he said.

"It's just a shame and again I hope Charlie [Tanfield] is okay.

"We don't have anything to do with our equipment, clothes and the rest out of the sport. We just go on the bikes and we just ride our race. That's the only job that we have. 

"We do what our team tells us to do. Ask a Formula One driver if he knows everything about the car – he does not. So, we don't know anything about our equipment. Ask our team, not us."

Italy, who set a new world record of 3:42.307 in their heat against New Zealand, now stand in Denmark's way of a gold medal on Thursday.

GERMANY SET NEW WORLD RECORD

In the women's team pursuit heats, Germany and Great Britain exchanged world-best times before the former's 4:06.159 reclaimed the record to set up a ride for gold between the two.

Germany, who had not claimed a medal in this specific event since its 2012 introduction, then left Laura Kenny's team in their tracks as they cruised to victory, setting a new world record of 4:04.242.

Kenny's silver meant she became just the fourth British woman to win at least five medals at the Games, though she admitted an element of shock at Germany's performance.

"I think they [Germany] took everyone by surprise," Kenny told BBC Sport after the final. "They were the quickest at the worlds, it was just in qualifying they didn't get it right. 

"I think they ran fourth or fifth. We knew they were going to go fast but just maybe not that fast."

The United States and Canada battled it out for bronze, with Chloe Dygert inspiring her team-mates to assure a place on the podium for the USA.

NETHERLANDS PREVAIL BUT KING KENNY CROWNED

World champions the Netherlands stormed to gold past the defending Olympic champions Team GB as they smashed the Olympic record with a time of 41.369 seconds.

The Netherlands last won a gold medal in the men's event in 1936 and the victory also means they join France as the only nation to win gold as reigning world champions in this cycling track event.

Jeffrey Hoogland, who is already a three-time world champion, concurred with team-mate Harrie Lavreysen as he explained his team had achieved the one goal they set before the Games.

"It means a lot. All these years of work and even the extra year process made it extra tough, but I think everybody had the same problem," Hoogland said after the final.

"As Harrie said, we are three times world champion. We are top of the top world riders, and we had each other to keep the level high. Sometimes that was hard but at the end it was all worth it."

Great Britain, who had collected gold at the previous three Games, had to settle for their second silver in just over 20 minutes, with Jason Kenny enjoying a bittersweet moment as he became the first athlete to win eight Olympic medals in track cycling.

Kenny also equalled the total medal haul of Britain's most successful Olympian Sir Bradley Wiggins, though Kenny has one more gold and silver.

France, who have claimed a medal in the men's team sprint in every Games since it was first held in 2000, edged out Australia for bronze.

Brazil will defend their men's Olympic football title in the final thanks to a classy display of penalty-taking in a 4-1 shoot-out defeat of Mexico following a 0-0 draw after extra time.

The 2016 champions were pushed all the way by Jaime Lozano's side in Kashima but ultimately got the job done on penalties, successfully converting all four of their attempts to reach the final where they will face either Spain or Japan.

Guilherme Arana spurned the best chance of the first half in the 13th minute when he was denied by Guillermo Ochoa with just the goalkeeper in his way.

An even better opportunity looked set to fall Brazil's way soon after as Douglas Luiz was sent tumbling in the box, but the initial penalty award was overturned following a VAR review, with the Aston Villa midfield shown to have exaggerated contact with Jose Esquivel.

The second half was far tetchier, however, with opportunities a rare commodity at either end. The best Brazil could muster until the latter stages was a feeble Antony effort that caused Ochoa no concerns.

Ochoa was beaten in the 82nd minute but the post came to his rescue, with Richarlison's header coming off the inside of the upright but refusing to cross the line.

That saw the match go to extra time and rarely did either side look likely to make the breakthrough, with penalties long appearing a formality.

Eduardo Aguirre missed Mexico's first kick in the shoot-out after Dani Alves had converted, giving El Tri an uphill battle right from the start, and Johan Vasquez did no better with their second as he smashed against the post.

Charly Rodriguez at least got Mexico on the board, but Reinier followed the example set by Gabriel Martinelli and Bruno Guimaraes before him to slot home the decisive kick.

Kevin Durant said Team USA have "got to finish it" after battling past Spain to reach the Olympic semi-finals.

The Brooklyn Nets star poured in a team-high 29 points as the United States won 95-81 at the Saitama Super Arena, bolstering their gold medal hopes.

It was far from an easy assignment, and nor was it always entirely convincing from the US team, who trailed 39-29 with 3:25 of the second quarter remaining.

They rallied impressively, however, to draw level at 43-43 at the halfway point, and Spain never led again.

"We started making shots there in the second quarter. Once we see that ball going into the rim, that put all of us at ease," Durant said.

"Our defence was a little better, a little tighter, we rebounded better after that. And guys just got more comfortable shooting the basketball.

"We drove it to the rim at the end of that second and were able to get our rhythm back a little bit. I like how we played in that second quarter, from the end of the second quarter all the way to finish the game, and that's how we're gonna need to play going forward.

"It was a huge boost. We didn't want to go into the half down double digits. We knew we didn't want to get down big against this team."

Ricky Rubio plundered 38 points for Spain, with the Minnesota Timberwolves man shooting 13-of-20 from the field. That gave him the highest score by a Spain men's player in an Olympic game, beating the 37 points that Pau Gasol scored against China in 2004.

Rubio also drained four of his seven shots from three-point range, the same as Durant, but USA's 22-6 run at the start of the third quarter took the game away from Spain.

The Spaniards briefly got back to just four points behind, in the early moments of the fourth quarter, yet despite their overall 42-32 dominance on the boards, they were found wanting elsewhere.

USA coach Gregg Popovich said: "I feel great about the victory knowing full well there is a lot of work to be done. We played a terrific basketball team.

"To play that team and go down by nine or 10 and stay in and find a way to win is very satisfying."

Durant feels the team are ready to step up a level, now they are through to the final four.

The pre-Olympics defeats to Australia and Nigeria no longer matter, nor does the loss to France in the Tokyo 2020 group stage.

"I love how we stuck with it throughout this whole period of time and guys started figuring out what we need to do," Durant said.

"You've just got to finish it. We're supposed to be here. For us it's about getting a gold."

Olympic chiefs have demanded answers from Belarus before the close of play on Tuesday over the saga involving sprinter Krystsina Tsimanouskaya.

Tsimanouskaya refused to board a flight home from Japan after allegedly being taken to the airport against her will, having publicly criticised her team's organisation on social media.

She competed in just one event, finishing fourth in a 100 metres heat, before being pulled out of the Games by Belarusian officials. Due to also compete in the 200m, she claimed a Belarusian coach entered her for the 4x400m relay despite her never racing in the event before.

Tsimanouskaya suggested that was a result of members of the team being considered ineligible due to not completing enough doping tests.

The Belarusian Sport Solidarity Foundation indicated Tsimanouskaya feared for her life upon returning to Minsk. The country is under the authoritarian leadership of president Alexander Lukashenko, whose son Viktor heads the national Olympic committee (NOC). Both men were banned last December from attending Tokyo 2020.

Now the International Olympic Committee (IOC) is stepping up its probe into what occurred.

IOC spokesperson Mark Adams said on Tuesday: "We've asked for a report from the [Belarusian] NOC today. We requested it yesterday, we want it today.

"We have decided to launch, not surprisingly, a formal investigation, which will be led by the IOC administration. We need to establish the full facts, we need to hear everyone involved. That obviously can take time."

Tsimanouskaya has been granted a Polish visa for now, and Adams said the 24-year-old spoke to the IOC twice on Monday, assuring that she now feels "safe and secure".

She has had police protection since alerting officers at Haneda airport to her situation.

"We've also now contacted the NOC of Poland," Adams said. "In terms of what the IOC can do for her in terms of her future we have talked to them with regard to her sport after her arrival in Warsaw, if that is where she does indeed choose to end up."

Alex Dickerson hammered a grand slam as the San Francisco Giants won 11-8 over the Arizona Diamondbacks in the MLB on Monday.

Leading 3-1 at the top of the fifth inning, Dickerson hit Diamondbacks right-hander J.B. Bukauskas over at right-field with bases loaded.

It was Dickerson's third career grand slam, having crushed one on his memorable franchise debut two years ago.

The home run was only Dickerson's 10th of 2021, with only 28 RBI this season.

The table topping Giants led 7-1 but the Diamondbacks, bottom of the National League West, stormed back after two-run shots from Josh Reddick and Asdrubal Cabrera.

Wilmer Flores homered to make it 8-5 before Arizona tied it up after three runs in the seventh inning off reliever Jay Jackson.

In the 10th inning, Buster Posey drove in Brandon Crawford, before two more runs, with Jarlin Garcia closing it out.

Brinson grand slam, Escobar HR home debut

Lewis Brinson hit a first-innings grand slam to lead the Miami Marlins to a 6-3 win over the New York Mets. With bases loaded, Brinson drove it out over right-field.

New acquisition Eduardo Escobar marked his home debut with a three-run home run in the Milwaukee Brewers' 6-2 victory over the Pittsburgh Pirates.

Right-hander Jorge Lopez allowed one hit across six innings as the Baltimore Orioles won 7-1 over the New York Yankees.

Andy Ibanez made an incredible sliding stop at second base with a throw to first in the Texas Rangers' 4-1 win over the Los Angeles Angels.

Rays brushed aside by Mariners

The Tampa Bay Rays (64-43) may be top of the American League East but they were humbled 8-2 by the Seattle Mariners (57-50) after conceding five runs in the third inning. It was not a good shift on the mound for Michael Wacha, allowing eight hits in four innings.

Guerrero tops the charts

Vladimir Guerrero Jr hit a two-run home run to tie it up in the Toronto Blue Jays' 5-2 loss to the Cleveland Indians. Guerrero now has an league high 82 runs and 85 RBI, while he is second behind only Shohei Ohtani for most home runs, with 34.

Monday's results 

Cleveland Indians 5-2 Toronto Blue Jays
Philadelphia Phillies 7-5 Washington Nationals
Baltimore Orioles 7-1 New York Yankees
Miami Marlins 6-3 New York Mets
Seattle Mariners 8-2 Tampa Bay Rays
Texas Rangers 4-1 Los Angeles Angels
Milwaukee Brewers 6-2 Pittsburgh Pirates
San Francisco Giants 11-8 Arizona Diamondbacks

Astros at Dodgers

World champions, the Los Angeles Dodgers (64-43) will host the Houston Astros (64-42) in a blockbuster rivalry meeting.

Raven Saunders could still face punishment for her crossed-arms 'X' political protest on the Olympic Games podium, despite USA team officials clearing her of any wrongdoing.

The shot put silver medallist raised her arms above her head in a pose she said represented "the intersection of where all people who are oppressed meet".

Saunders, who is black and gay, has been backed by the United States Olympic and Paralympic Committee (USOPC), but that is not the end of the matter.

The USOPC said in a statement on Monday: "Per the USOPC's delegation terms, the USOPC conducted its own review and determined that Raven Saunders' peaceful expression in support of racial and social justice that happened at the conclusion of the ceremony was respectful of her competitors and did not violate our rules related to demonstration."

Yet political statements on the medal podium are not permitted at Tokyo 2020, even though rules on such actions have been relaxed elsewhere by the International Olympic Committee (IOC).

In the wake of the USOPC remarks, the IOC was seeking further answers from the Americans on Tuesday.

Mark Adams, the IOC spokesperson, said in a briefing: "We've seen their public opinion and we're in touch with them.

"We've written a letter asking for some further information, to be able to evaluate the next steps, if any, that should be taken.

"Obviously, the Games are held under the Olympic charter and the rules of the Olympic movement, so let's wait to see what clarification we get from USOPC."

It seems unimaginable that the IOC would take any drastic action, given the outcry that would follow.

Saunders tweeted on Sunday: "Let them try and take this medal. I'm running across the border even though I can't swim."

The Olympic Games has seen few such protests on podiums. Perhaps the most notable was the 'Black Power' salute by Tommie Smith and John Carlos, gold and bronze medallists respectively in the 200 metres at the 1968 Mexico City Olympics, when both raised a black-gloved fist as the US national anthem was played.

Both were expelled from the Games but got to keep their medals.

Tennis great and long-time equal rights activist Billie Jean King has backed Saunders, writing on Twitter: "Her gesture was meaningful and respectful. There is nothing for the IOC to investigate."

Hosting an Olympic Games at any time can be a logistical nightmare. Doing so during the height of a deadly pandemic only exacerbates the difficulties.

For example, how do you go about trying to appease a largely Olympic-sceptic city like Tokyo, whose residents were fearful of the effect welcoming thousands of athletes, officials and world's media would have in increasing coronavirus infection rates.

Stats Perform's man on the ground, Peter Hanson, provides a look at how travel is working at Tokyo 2020 to assuage the fears of the locals, and a behind-the-scenes glimpse of his journeys to the arenas he has visited.

BUSES, BUSES AND MORE BUSES...

Let's start with a secret.

This isn't my first time in Tokyo. I actually visited here seven years ago with a couple of American friends. The three of us had recently been in Bangkok for our buddy's Thai wedding and had decided to make the hop across to continue our travel adventure.

My overriding memories of that first jaunt were just how futuristic it felt, the signs and billboards burning bright LED lights directly into my quickly faltering retinas. For a major city, I remember also thinking how clean the place was. I'm a big fan of city dwelling – but most can be a little untidy in places.

The other thing that sticks out is how absolutely hopeless I was at navigating my way around. This is nothing new, I can barely get around the streets of Sheffield and Rotherham – the places I have lived my entire 31 years – back in England without needing to follow Google Maps. Luckily for me, my travel companions are not quite so directionally challenged, so I largely just hopped on whatever subway they did and didn't ask questions...

So, when I first got asked if I'd like to cover these Games my first reaction was "yes, absolutely". My second was "better start saving up for three weeks' worth of Ubers".

But these are pandemic times, and pandemic times call for pandemic measures. There are rules in place and restrictions to follow, and one of the great logistical challenges Tokyo 2020 organisers have faced is how to ferry around hordes of the world's media while restricting their interactions with locals – many of whom were not keen on hosting the Olympics at all – during the Games.

I have to say, the end result has been pretty impressive. As soon as you enter the departure hall at the airport, you are ferried onto a shuttle bus, taken to a taxi rank being held inside a huge car park around 20 minutes away, popped into a taxi and driven straight to your hotel.

For someone as dense with directions as I am, this was a bit of a relief.

But that was just the first problem to solve. For the first 14 days of your visit to Tokyo, you have to agree not to go anywhere other than your hotel or to Games-specific locations in a previously agreed Activity Plan.

For that fortnight you are also told not to take public transport anywhere. To solve this issue, Tokyo 2020 has created quite the travel network.

The media transport mall at the media centre is connected to nearly all the Games venues. There are over 30 terminals (not quite like you would see in a normal indoor bus depot – rather a series of stops in a huge outdoor space with sort of crudely constructed tents to keep you sheltered should it rain).

Approximately a third of these stops are connected to a list of Tokyo 2020-approved hotels, running buses to our accommodation 24 hours a day (although, understandably, between midnight and 6am these run much less frequently). 

The rest ship us off to the Games venues, with drop-off points roughly a five-minute walk to the various media centres.

It is not the only way to get around a city still under a state of emergency. Tokyo 2020 has created the Transport by Chartered Taxi system, whereby you can book Games-specific vehicles to cart you around to the desired location.

After that initial two weeks, you are technically allowed to use public transport (and are provided a travel pass to do so) but actively encouraged to keep using the media network to limit social interactions with the regular public.

MARVELLING AT THE MEDIA CENTRE

One of the things I was most looking to when entering Japan was seeing the media centre.

Okay, sure, partly because I'd been couped up in quarantine for three days and the escape from the four walls of my hotel room was a blessed relief.

But mostly because I was itching to see for the first time what a media centre for an Olympics looks like.

Once taking the bus from the hotel to the media centre, getting in is quite a smooth process. The media complex – which adjoins to the broadcasting centre – is so big that from the transport mall you have to take a shuttle bus. From there, you undergo a temperature check, lower your mask so the security cameras can get a good look at your face, and scan your accreditation card before waiting nervously for the green light to give recognition you are an approved member of the media.

The first impression was just how big the complex is. There are rows upon rows of hot desks, all with plug sockets and LAN cables, while every which way you turn there are TV monitors showing a variety of different events.

There are private offices everywhere (for the likes of the IOC and British Olympics association), medical rooms to drop off PCR tests, help desks for everything from tech woes to transport, food courts, cafes, fancy-looking vending machines…you name it, over several vast floors it's (probably) got it.

TRIBUNE TRAVAILS AT THE AQUATICS CENTRE

The sad thing about the Tokyo Aquatics Centre is the fact it serves as a reminder that these are the Games that could have been.

Opened in February 2020 close to Tokyo Bay, it is a hugely impressive structure that holds approximately 15,000 spectators – sadly, save for the pockets of athletes cheering on their team-mates, these seats are not in use and the bright-blue glow of the pool and the huge screens present an almost eerie feeling without the packed rafters.

My first trip there was an exciting one, though. It would act as my first "live" view of these Games and I got to witness TeamGB's first gold medal of Tokyo 2020 thanks to Adam Peaty, and caught most of Tom Daley's emotional triumph in the men's synchronised 10 metre diving.

It's a process much like the media centre to get in, only here you have a physical thermometer placed on your forehead to check you don't have a temperature. But as at all the venues you do go through airport-style checks before heading down to the media. It was at the aquatics centre I was asked to taste the bottle of water in my bag and, even though I knew it wasn't possible, I did start to panic and wonder what if it had been poisoned…

It hadn't of course and off I popped down the road towards the media area, which for the aquatics centre is a long tent that also adjoins to the press conference room.

So far so good. My issue came again with my aforementioned navigation skills. My friends back home call me 'Captain Direction' I'm that hopeless with them (okay, that's a nickname I actually gave myself but still…). The problem I encountered was trying to find my appropriate area in the media tribune, walking through about 10 different doors, and walking up and down several hefty flights of stairs before I reached the conclusion that I had probably been in the right place from the start…

INSPIRED BY SIMONE AT THE GYMNASTICS CENTRE

Before I travelled to Tokyo, I had a rough idea in my head of some of the things I wanted to do. One at the very top of my priority list was seeing Simone Biles live in the gymnastics.

So, on the first Tuesday of the Games I managed to get a high-demand ticket for the Ariake Gymnastics Centre to watch the final of the women's team event.

The trip there was probably my favourite, because unlike a lot of the other buses that serve just a single venue, this one was bit of a stadium hop around Ariake – a district of Koto in Tokyo.

Before I made it as far as the gymnastics centre, I was treated to a look at the Ariake Tennis Park – where there was a deep temptation to jump off and try and catch a glimpse of Novak Djokovic or Naomi Osaka – and Ariake Arena, where the volleyball was being held. 

Eventually, I arrived at the gymnastics centre – an impressive temporary venue, which after the Games will be turned into a 12,000 seater sporting arena, and went through the now customary protocols to get inside.

Unlike my first journey to the aquatics centre, finding my way around here was an absolute breeze. All of the media facilities are inside the building, and there are signs pretty much every few yards directing you to the tribune.

I should at this point make another admission. I don't know the first thing about gymnastics. In fact, when I was at school I was so hopelessly bad at the sport in P.E. or gym or whatever you call it where you are, that my "routine" consisted of a shambolic forward roll and jazz hands. In my defence I was short, stocky, not particularly agile and carrying about 20lbs extra weight. All of those things still stand true today.

But it was too good an opportunity to pass up and it seemed the same for a lot of people in there. I sat next to a journalist from Denmark (whose son by the way is named Peter Hansen – hello Spider-Man meme!) who was there for the exact same reason as me, to see Biles in person.

There was no way to predict what came next, with this genuine living legend managing just one rotation before sitting out the rest of the event. She later revealed she has been contending with mental health issues.

Sitting in the news conference room, it was impossible not be completely full of admiration for this frank admission. Her bravery to send that message, I think, is more important than any achievement she has in gymnastics.

DISCOVERING THE OLYMPICS STADIUM

Another on my bucket list for this trip was obviously to check out the Olympics Stadium. I decided to book in for the athletics at the first opportunity and go to the morning session last Friday.

By that point, I'd been in Tokyo for 10 days and the long days and sleepless nights had taken their toll…so my first journey there I can't recall too much to you because I took a decent snooze on the 30-minute trip.

But, when I got there my initial thought was wow. I absolutely love sports stadia, you can't be a sports-obsessed kid like I was and not. I've seen some impressive arenas in my time – Wembley, Soccer City in Johannesburg, Yankees Stadium…Hillsborough.

And this is right up there among the best I've been to. Only, after that initial buzz I must say I was almost overwhelmed by a sudden sadness. 

I think maybe because at the other venues I'd visited I was so one-track minded in what I wanted to do whereas my first visit here was more about finding my bearings and preparing for a busy week to come. 

I remember going to one of the morning sessions at London 2012 and the Olympic Stadium was absolutely packed. It was weird seeing this place (with a capacity of 68,000) empty knowing it would stay that way for the rest of the Games, and knowing that really it deserved better.

Karsten Warholm revelled in the "wow" factor of his astonishing 400 metres hurdles triumph as the world record was obliterated at the Tokyo Olympics.

The 25-year-old Norwegian ran 45.94 seconds, breaking the record for a second time in five weeks, after Kevin Young previously held the global mark for 29 years.

"I didn't touch one hurdle. I was even able to find another gear coming home, so 'wow'," Warholm said.

"It's just so big. It's almost like history here. It was the only thing missing from my collection. I had a World Championships [gold medal]. I had European Championships, I had the world record, the European record.

"The Olympic gold medal is what everybody talks about. I knew this race was going to be the toughest of my life, but I was ready."

The top three in the race all went under 47 seconds and beat the previous Olympic record, with silver for American Rai Benjamin in 46.17 and bronze going to Brazilian Alison dos Santos in 46.72.

Warholm ran 46.70 in Oslo at the start of July to slash 0.08 seconds off Young's long-standing record, which was set at the Barcelona Olympics.

There were many ways to dissect the magnitude of this latest record, and one was to look at how the world record shifted by just 0.75 seconds from Ed Moses running 47.45 in 1977 until Warholm's 46.70 in July.

To now scythe a further 0.76 seconds off the all-time mark represented a staggering achievement.

"I mean, man it’s so crazy. It’s by far the biggest moment of my life," Warholm said.

"It defines everything, all the hours I put in, everything that my coach has been working for.

"I dream about it like a maniac, I tell you. I sleep all night on it. I spend all my time thinking about this, so just getting this last medal into my collection, it’s complete.

"I can't sleep. I've spent thousands of hours thinking about this.

"I had this special feeling in my chest, you know when you are nervous. I was just thinking this is the feeling that I had when I was six years old. I've never had that feeling since I got older, but yesterday I had it."

Warholm had a healthy lead heading into the final 150 metres but came under pressure from Benjamin over the final two barriers, the gap closing.

The 25-year-old from Ulsteinvik held his nerve and maintained his rhythm, though, sprinting away to post a record that could stand for many years to come.

Some even compared it to Bob Beamon's 1968 long jump world record in Mexico City, which stood for 23 years and remains the second longest leap of all time.

Benjamin was reduced to tears after the race, having delivered the performance of his life but still finished on the second step of the podium

"Knowing that you want to be the best, this is what it costs. It's hard. It hurts. But it is what it is," Benjamin said.

"I always give myself 24 hours to process things. Right now I am just full of emotion. I have worked so hard. This is what matters. I got a medal but it just hurts to lose."

He added: "I'm a dog. I'm a fighter. It's my first Olympics. I made some mistakes that cost me, but it's all right. I'll fix it."

Ninth seed Alison Riske defeated former top 10 player CoCo Vanderweghe in the opening round of the Silicon Valley Classic in straight sets on Monday.

Riske, who made the Wimbledon quarter-finals in 2019 and is currently ranked 37th in the world, won 6-3 6-4 in one hour and 28 minutes.

In a match which saw eight breaks converted, Riske's ability to win on her first serve proved the difference.

Vanderweghe, who made the Silicon Valley Classic finals in 2012 and 2017, was broken five times and won 58.1 per cent of first serve points.

Croatian sixth seed Petra Martic eased into the second round with a 6-3 6-3 victory over Anastasija Sevastova.

Martic will face Magda Linette next, after the Pole accounted for Dutch qualifier Lesley Kerkhove 6-3 6-3.

Ana Konjuh defeated Marie Bouzkova in a three-set epic which last two hours and 41 minutes, winning 7-5 3-6 7-5.

China's Zhang Shuai won over Emma Raducanu in straight sets, along with Carolina Garcia who defeated Emina Bektas.

Karsten Warholm set a massive world record in the men's 400 metres hurdles as the Norwegian landed gold at the Tokyo Olympics.

He became the first man to dip under 46 seconds, setting a startling time of 45.94 seconds as he fended off American Rai Benjamin, who clocked 46.17.

The top three in the race all went under 47 seconds and beat the previous Olympic record, with bronze going to Brazilian Alison dos Santos in 46.72.

Warholm was already the world record holder, setting a time of 46.70secs in Oslo at the start of July to break the previous best of 46.78 that had been held by Kevin Young since the 1992 Barcelona Olympics..

Now he has demolished his own mark, helped by being pushed all the way by Benjamin.

Warholm had a healthy lead heading into the final 150 metres but then came under pressure from the USA star over the final two barriers, the gap closing.

The 25-year-old from Ulsteinvik held his nerve and maintained his rhythm, though, sprinting away to post a record that could stand for many years to come.

All three medallists went under the previous Olympic record.

Gold in the women's long jump went to Germany's Malaika Mihambo, whose final-round effort of 7.00 metres saw her edge ahead of America Brittney Reese and NIgerian Ese Brume, the silver and bronze medallists, who both posted best leaps of 6.97m.

Young American Jenson Brooksby claimed some revenge for last month's Hall of Fame Open final defeat to Kevin Anderson by beating the South African 7-6 (7-4) 6-3 in the Citi Open first round on Monday.

Brooksby, who received a wildcard for the draw, triumphed in one hour and 49 mnutes against the former world number five.

The 20-year-old American saved a set point at 5-6 in the first set, before winning in a tiebreaker off the back of winning six consecutive points having trailed 1-4.

Former City Open finalist Anderson, who sent down 10-1 aces, had defeated Brooksby to win the Hall of Fame Open last month.

World number 130 Brooksby, who had started the season outside the top 300, claimed the crucial break in the eighth game of the second set.

Brooksby advances to take on American Francis Tiafoe, fresh from competing at Tokyo 2020, as numerous big names enter the draw for the second round.

Kei Nishikori, who won in Washington in 2015, got past American Sam Querrey 6-4 6-3 to set up a second round meeting with Kazakhstani ninth seed Alexander Bublik.

American Jack Sock will take on top seed Rafael Nadal in the second round after he got past Yoshihito Nishioka in a walkover 6-7 (3-7) 4-0.

Former top 20 player Andreas Seppi triumphed in three sets against Yasutaka Uchiyama while Canadian tour veteran Vasek Pospisil got past Emilio Gomez in three.

Ilya Ivashka, Marcos Giron, Ricardas Berankas and Daniel Galan were the other first round winners on Monday.