World number 26 Madison Keys was one of three seeded players to be eliminated in the second round of the Silicon Valley Classic in San Jose on Wednesday.

The American third seed was beaten by China's Zhang Shuai 7-5 7-6 (7-5) in one hour and 39 minutes.

Keys sent down 7-1 aces but Zhang, ranked 51st in the world, was excellent on return, converting four of her 11 break points.

Fourth seed Daria Kasatkina was also in danger after losing the first set but rallied to win 3-6 7-5 6-3 over France's Caroline Garcia.

"It was a tough match. From my point of view, I think the level of the game was very good, and I'm really happy that I was able to turn the match in the second set," Kasatkina said in the on-court interview.

Ninth seed Alison Riske was emphatically beaten by Croatian Ana Konjuh 6-1 6-4 in one hour and 13 minutes, while sixth seed Petra Martic bowed out to Poland's Magda Linette 7-5 7-6 (7-5).

World number three Rafael Nadal outlasted Jack Sock in a three-hour epic to progress through to the third round at the Citi Open in Washington D.C. on Wednesday.

The 20-time Grand Slam winner needed a third-set tiebreaker to beat American wildcard Sock 6-2 4-6 7-6 (7-1).

Sock, who is currently ranked 192nd in the world, stormed back into the match with an early break in the second set after the Spaniard cruised in the first.

In a three-hour-and-a-four-minute match which saw only five breaks, Nadal got the edge winning more on his second serve, while he produced some vintage winners too.

Nadal goes through to the third round where he will face 14th seed Lloyd Harris, who progresses after a walkover with Tennys Sandgren retiring mid-match.

Third seed and world number 18 Alex De Minaur was bundled out by world number 81 Steve Johnson 6-7 (5-7) 6-4 6-2.

Fourth seed Grigor Dimitrov also was dumped out with a 6-2 7-6 (7-4) defeat to Belarussian world number 65 Ilya Ivashka.

Sixth seed Dan Evans went out in straight sets to 20-year-old American Brandon Nakashima 7-6 (7-1) 6-0 while 10th seed Taylor Fritz also bowed out to Denis Kudla 6-4 6-2.

Former winner Kei Nishikori knocked off ninth seed Alexander Bublik 6-2 7-5, while 13th seed Benoit Paire lost in three sets to Mackenzie McDonald.

Fifth seed Jannik Sinner got through in straight sets against Emil Ruusuvuori, along with eighth seed Reilly Opelka and 11th seed John Millman.

Free agent Victor Oladipo has agreed to a one-year deal to stay with the Miami Heat, according to reports.

The 29-year-old point guard had joined the Houston Rockets from the Indiana Pacers as part of January's James Harden trade, before moving again to the Heat in March.

Olapido is set to remain in Miami and consider free agency in 2022 once he is at full fitness, after a sustaining a knee injury before opting for season-ending surgery on his quad in May.

The Athletic's Shams Charania reports that the Heat will retain Oladipo's Bird Rights, which will allow them to find the means to sign him again next offseason.

Oladipo averaged 19.8 points, 4.8 rebounds and 4.6 assists per game in the 2020-21 NBA season having had a breakout 2017-18 with the Indiana Pacers, before a series of injuries slowed his progress.

The two-time All-Star played just four games with the Heat following his trade from the Rockets.

Wesley Fofana suffered a potentially serious injury on Wednesday as he left the pitch on a stretcher during Leicester City's pre-season friendly against Villarreal.

The defender was carrying the ball forward when he was caught by a lunging slide tackle from behind by Fernando Nino, forcing the Frenchman off injured on the hour-mark at the King Power Stadium.

Paramedics and Leicester's physios immediately rushed on to tend to Fofana before carrying him off on a stretcher and Brendan Rodgers was visibly frustrated with both the Villarreal dugout and players on the pitch.

The details of his injury remain unclear but it potentially leaves Leicester, who are already without the injured Jonny Evans, another defender short just 10 days before the Premier League campaign begins.

Having joined from Saint-Etienne in September 2020, Fofana impressed in his debut season as he made 28 appearances for Rodgers' men, who missed out on Champions League football at the final hurdle.

Despite missing 10 top-flight fixtures, Fofana ranked third for the Foxes in terms of duels won (183), second for aerial success (91) and joint-first for interceptions with Wilfried Ndidi (61 each).

Leicester were leading 3-0 at the time, though only finished as 3-2 winners over Villarreal, with the La Liga outfit pulling back two late goals.

The Foxes, who won the FA Cup against Chelsea last term, have now completed their final pre-season game and next face Manchester City in the Community Shield on Saturday.

A brace from Hakim Ziyech had Chelsea seemingly coasting to victory at Stamford Bridge before Tottenham fought back to earn a 2-2 pre-season draw on Wednesday.

Goals either side of half-time from Ziyech gave Chelsea a well-deserved two-goal lead but Lucas Moura and Steven Bergwijn cancelled out the Blues' advantage with second-half finishes of their own.

Having paraded their Champions League trophy in front of the near-capacity crowd prior to kick-off, Chelsea got off to an emphatic start with Ziyech blasting in low from the edge of the area to capitalise on Lucas' laziness in possession.

Timo Werner thought he had added a second after rounding Pierluigi Gollini, though the offside flag denied him – with no VAR in operation, the Germany forward could not argue with the decision, despite seemingly looking onside.

Tottenham, who were still without the absent Harry Kane, named a strong starting-11, including Son Heung-Min and Dele Alli, but fell two behind when Ziyech drilled in a second just two minutes after the break.

Lucas responded for Nuno Espirito Santo's side, netting a third in pre-season courtesy of a fortuitous looping deflection off Antonio Rudiger wrong-footing Edouard Mendy.

Bergwijn levelled things up 14 minutes later with a thumping finish past Mendy after smart link-up play down the left flank by Moura and Son.

Having dominated for large periods the draw may frustrate Chelsea, who next face Villarreal in the European Super Cup on August 11, while Tottenham round-off their pre-season preparations against Arsenal three days before.

A Tottenham side deprived of the services of star man Harry Kane fought back after two Hakim Ziyech goals to earn a 2-2 draw with Chelsea at Stamford Bridge.

Goals either side of half-time from Ziyech gave Chelsea a well-deserved two-goal lead but Lucas Moura and Steven Bergwijn cancelled out the Blues' advantage with second-half finishes of their own.

Having paraded their Champions League trophy in front of the near-capacity crowd prior to kick-off, Chelsea got off to an emphatic start with Ziyech blasting in low from the edge of the area to capitalise on Lucas' laziness in possession.

Timo Werner thought he had added a second after rounding Pierluigi Gollini, though the offside flag denied him – with no VAR in operation, the Germany forward could not argue with the decision, despite seemingly looking onside.

Tottenham, who were still without the absent Kane amid his apparent desire to leave, named a strong starting-11, including Son Heung-Min and Dele Alli, but fell two behind when Ziyech drilled in a second just two minutes after the break.

Lucas responded for Nuno Espirito Santo's side, netting a third in pre-season courtesy of a fortuitous looping deflection off Antonio Rudiger wrong-footing Edouard Mendy.

Bergwijn levelled things up 14 minutes later with a thumping finish past Mendy after smart link-up play down the left flank by Moura and Son.

Having dominated for large periods the draw may frustrate Chelsea, who next face Villarreal in the European Super Cup on August 11, while Tottenham round-off their pre-season preparations against Arsenal three days before.

China failed to top the podium on day 12 at Tokyo 2020 but still hold a seven-gold buffer over the second-place United States in the medal table.

The leaders endured a rare quiet outing on Wednesday, with Rio silver medal pairing Huang Xuechen and Sun Wenyan providing the sole silver of the day for China in the artistic swimming.

The USA failed to significantly dent the eight-gold gap from Tuesday, collecting just one gold in the women's 400m hurdles, where Sydney McLaughlin obliterated her own world record as part of an American one-two with defending Olympic champion Dalilah Muhammad.

Muhammad's silver was one of three – all on the athletics track – for the USA as Courtney Frerichs and Kenny Bednarek boosted the medal count – the latter finishing second to North American rival Andre de Grasse in the men's 200m final.

Japan, who led the early gold count in Tokyo, remain in third and added golds through Yukako Kawai in the women's wrestling and Sakura Yosozumi in the women's skateboarding – Japan's third of four possible golds in the debuting event.

Great Britain leaped up from sixth to fourth as Hannah Mills and Eilidh McIntrye secured gold in the women's sailing and Ben Maher became Team GB's second successive showjumping champion, backing up Nick Skelton's win at the previous Olympics.

Australia are tied with Team GB on 15 golds after Mathew Belcher and Will Ryan sailed to victory in the men's 470 to go one better than their runners-up finish at Rio in 2016.

The Russian Olympic Committee make up the top six after Svetlana Kolesnichenko and Svetlana Romashina overcame China's Xuechen and Wenyan in the first of two artistic swimming events to win the Russians' 14th gold of the Games.

Meanwhile, Peruth Chemutai became the first Ugandan woman to win an Olympic medal as she claimed gold in the women's 3,000m steeplechase.

Canadian sprinter Andre De Grasse ended his long wait for an Olympic gold medal in the 200 metres final, while Italy smashed the world record in the men's team pursuit final on Wednesday.

De Grasse took silver behind the great Usain Bolt in this event five years ago, while he claimed a bronze in the 100m and 4x100m relay.

But there was no stopping the 26-year-old, who was also a bronze medallist in the 100m earlier this week. 

De Grasse registered a national record of 19.62 seconds; finishing 0.06s ahead of America's Kenny Bednarek, whose compatriot Noah Lyles completed the podium.

He also became the third Canadian champion of the men's 200m at the Olympic Games – and first since Percy Williams in 1928.

"I finally did it. I always felt like I came up short, winning bronze and silver, so it is good to have this gold medal," he said.

"No one can take that away from me. I lived for this moment. This is what dreams are made of. I did this for my kids.

"I am proud of this moment and I want everybody to know. I shocked the world and that is what I came to do. 

"Everyone was saying that the Americans were going to win, but this was my moment and I knew I had it in me.”

FORZA AZZURRI

Italy smashed the world record as they beat Denmark to glory in the men's team pursuit final.

Filippo Ganna – the reigning world time trial champion – produced the goods in the final 1,000m as the Italians edged their noses in front before crossing the line in 3:42.032 – almost eight seconds faster than Great Britain's winning time in Rio five years ago.

"We knew that we were fighting against a really good team, so we were off to a very good start and we were able to overtake," Ganna said.

"We knew that after 2.5 kilometres, we had people who were much stronger, so we wanted to attack them in the last kilometre. We thought that was where we would make the difference.

"I think we can really enjoy the moment now. It's really wonderful to have this medal around our necks and I want to thank all those who have encouraged us day after day to do better."

SWEET SIX FOR SVETLANA

Svetlana Romashina became the most decorated artistic swimmer in Olympic history after claiming her sixth gold medal in the women’s duet.

Alongside Svetlana Kolesnichenko, Romashina scored 98.800 after a wonderful routine in the final to land gold in this event for a third successive Olympic Games.

"I don't think about the sixth medal, I just think about our work which we have done," she said.

"We are very happy. I think we are happy of our work, of our team.

"I don't count the medals, I just want to feel this moment."

LASHA’S RELENTLESS STREAK CONTINUES

Georgia's Lasha Talakhadze resumed his domination of the super heavyweight division, lifting a total of 488kg on the way to glory in the men's +109kg event.

Talakhadze established three world records along the way in snatch, clean and jerk, and total, while finishing 47kg ahead of Iran's Ali Davoudi.

He has now won all 26 available gold medals in major international competitions since the 2016 Olympic Games.

"I feel quite well. I have just gained for a second time an Olympic gold medal and, of course, I have also set a new world record," Talakhadze said.

"When I was standing on the podium, hearing my country's national anthem, it was most exciting because we were for a long time looking forward to this Olympic Games and winning this gold."

Kemba Walker is joining his hometown New York Knicks after agreeing to a buyout with the Oklahoma City Thunder on Wednesday.

ESPN and The Athletic reported the move, which sees Walker leave the Thunder without playing a game.

The four-time All-Star was part of a June trade that saw OKC send Al Horford back to the Boston Celtics and receive the 16th pick in the 2021 NBA Draft.

The Thunder, who are building a young team after trading superstars Russell Westbrook, Paul George and Chris Paul in recent seasons, turned that selection into two more in a deal with the Houston Rockets.

Walker's exit gives OKC more minutes to dish out to prospects and sees the Knicks recruit the starting point guard they badly needed.

Elfrid Payton started 63 games last season but lost his place after 13 minutes, one point and one assist in the playoffs. Frank Ntilikina appeared fleetingly in three postseason games.

Derrick Rose was promoted to a starting role, having rediscovered some form leading the second unit, but the Knicks lost all three of his starts and badly missed his consistent contributions from the bench.

Rose has returned to Madison Square Garden on a three-year, $43million contract yet will likely now serve as back-up to Walker.

Walker is expected to fit into the $10m salary cap space left in New York following the Knicks' free agency business, which included the signing of the guard's former Celtics team-mate Evan Fournier.

Walker, who is only two years removed from an All-NBA Third Team season with the Charlotte Hornets, still had two years and $74m remaining on his previous deal before Wednesday's agreement with the Thunder.

The Knicks will be hoping for an offensive boost from Walker, who was born in The Bronx and went to high school at Rice in Manhatten.

The best defense in the league, giving up only 104.7 points per game, carried the Knicks to the playoffs for the first time in eight years, but they scored only 107.0 points on offense, ranking 26th, and lost to the Atlanta Hawks in the first round.

Walker scored 25.6 points and played all 82 games for the Hornets in a career year in 2018-19, earning the move to Boston.

But a series of injuries kept him from playing or performing consistently for the Celtics, while his usage rate last year fell to 26.3 per cent alongside ball-dominant duo Jayson Tatum and Jaylen Brown.

Walker will get the opportunity to shine again in a prominent role at MSG, as long as he can stay fit.

Japan squeezed through to the women's basketball semi-finals following a dramatic 86-85 victory over Belgium at the Tokyo Olympics.

Targeting a first medal in the event, the host nation almost suffered last-gasp heartbreak after recovering from 70-61 behind in the final quarter.

Saki Hayashi’s three-pointer put them in front by one with 16 seconds remaining, but there was still time for Belgium’s Kim Mestdagh to take aim right at the death.

However, her last-second jump shot bounced off the rim, meaning Japan go through to a last-four clash with France.

"There were so many peaks and valleys. We were hanging on to the cliff by a fingernail in the fourth quarter," coach Tom Hovasse said.

"We just came up with plays and towards the middle of the fourth quarter, we ramped up our defence and that took them out of their comfort zone.

"We believe in ourselves, and I am hoping more people outside our locker room believe in us.

"I think it is safe to say it is the biggest win in Japan basketball history."

FRANCE FEND OFF SPAIN FIGHTBACK

Japan's next opponents are France, who beat Spain 67-64 after another epic encounter.

Despite dominating most of the contest – Marine Johannes leading the way with 18 points – France appeared in danger of throwing it all away as they fell 61-60 behind.

However, they recovered to snatch victory and secure a third consecutive appearance in the last four.

Astou Ndour had 16 points in a losing cause for Spain, runners up from the Rio Games who will not be taking home a medal this time around.

SERBIA STUN CHINA

Serbia were another team to produce an inspired turnaround as they defeated China 77-70.

Bronze medallists on their debut in Rio, the European champions recovered from 58-50 down to reach their second successive semi-final at the Games.

"How many times have we done this, 20, 30 times?" said shooting guard Ana Dabovic, who claimed six assists during the game to go alongside her 13 points.

"We never quit, and we play the hardest when we are down. We showed today we can find energy.

"This is a great success for a small country. Second time at the Olympics for Serbia; second time in the semi-finals. This is great."

Jelena Brooks top-scored with 18 points for Serbia, while Sonja Vasic had 16.

SEVEN IN A ROW STILL ON

The United States remain on course for a seventh straight Olympic gold after easing to a 79-55 win over three-time silver medallists Australia.

Breanna Stewart led the way with 20 first-half points – she would finish the contest with 23 overall - as USA ran out 79-55 winners.

"I thought we came out and played inspired basketball on both sides of the ball," said coach Dawn Staley.

"We played with an incredible desire to advance and it was just contagious.

"I thought our team was focused on keeping the heat on Australia and not let them back in the game."

Team USA have not failed to win the women’s tournament at an Olympics since Barcelona in 1992.