Aryna Sabalenka believes her improved calmness was the key to her reaching a second consecutive US Open final.

The Belarusian beat one of the home favourites Emma Navarro in straight sets on Thursday, needing a tie-break to edge past the in-form American.

Sabalenka, who finished as runner-up to Coco Gauff in the tournament last year, won 6-3 7-6 (7-2) in just over 90 minutes on Arthur Ashe Stadium.

After a relatively comfortable first set, Sabalenka looked to be cruising in the second too, until Navarro clawed her way in front after being 5-3 down.

However, the number two seed soon regained her footing to win the tie-break, and she credits the work she has put in on her mindset as the game changer.

"I worked really hard on my mindset on the match," Sabalenka said afterwards. "I think I made really huge improvement on that calmness, on those crucial moments.

"Even if things are not working well for me, I still keep doing the right things, and I'm staying in control. I'm really proud, I'm actually really proud of myself that I was able to get to the point when I'm in control of my emotions."

Data Debrief: Back-to-back

Sabalenka has dropped just one set throughout the US Open this year, and has put herself in the best position to win the competition for the first time. 

The 26-year-old is the first woman to reach back-to-back US Open finals since Serena Williams in 2018 and 2019. She has now reached all four hard court grand slam finals in the last two years.

Since the Australian Open's switch from grass in 1988, Sabalenka is just the fifth player to reach the women's singles final at the Australian and US Open in consecutive seasons after Steffi Graf, Monica Seles, Martina Hingis and Victoria Azarenka.

Jannik Sinner was pleased with how he "stayed in every moment" in a "tough" US Open quarter-final against Daniil Medvedev.

The world number one is the only grand slam winner left in the draw after overcoming Medvedev, the 2021 champion at Flushing Meadows, in four sets.

Sinner has reached the semi-final at the US Open for the first time in his career, becoming the fourth active player to reach that stage at all four grand slams.

His triumph means he will play Jack Draper for a place in the final, with the Brit yet to drop a set in an impressive display in New York.

And Sinner acknowledged how hard he had to work to get there after going toe-to-toe with Medvedev for the third time in grand slams this year.

"Tough match, obviously," Sinner said. "Starting a break up in the first and third helps with the confidence, it helped me mentally to stay there in every moment.

"We played in Australia this year and then London. We knew it was going to be very physical. It was strange the first two sets because whoever made the first break then started to roll.

"I'm happy how I handled the situation, it's very tough against him. I think it was a great match from both sides. The fourth set was very tough."

Meanwhile, Medvedev was unable to capitalise on a strong second set, as the only former US Open champion left in the men's draw crashed out.

The Russian made six double faults and 57 unforced errors as he struggled to match Sinner's aggressive play in the latter stages.

"Sometimes you feel like you're doing all good, and then you miss, and then you have question marks, et cetera," Medvedev said.

"Maybe today I was going for a little bit more risky shots, I was missing just a bit more. As I said, one moment I kind of got lost in my misses."

Jessica Pegula admitted she was confident in beating a "prime" Iga Swiatek to reach her first grand slam semi-final at the US Open. 

Pegula, who had lost her previous six slam quarter-finals, came through in straight sets at Flushing Meadows to stun the world number one. 

She also became the fourth American in the Open Era to reach the women’s singles semi-final at the Canadian, Cincinnati and US Open in a calendar year after Rosemary Casals (1970), Serena Williams (2013-15) and Sloane Stephens (2017).

Pegula's triumph set up a meeting with Karolina Muchova for a place in the final after the Czech overcame illness to beat Beatriz Haddad Maia, also in straight sets. 

With Emma Navarro along with Frances Tiafoe and Taylor Fritz advancing to the final four, it is the first time two Americans have reached the semi-finals in the women’s and men’s singles at the US Open since 2003, with Jennifer Caprati, Lindsay Davenport, Andy Roddick and Andre Agassi the first do so. 

It also marked Pegula's fourth victory over the Pole, with the latest win considered one of her best. 

"I've been [to the quarter-finals] so many freaking times but I kept losing," Pegula said. 

"Finally - finally - I can say I'm a semi-finalist. Thank you to the crowd, you carried me through that last game.

"To do it at prime time against the number one player in the world - it's crazy, but I knew I could do it."

Jannik Sinner is into the semi-finals of the US Open for the first time in his career after beating former champion Daniil Medvedev.

The world number one became the fourth active player to reach a semi-final at all four grand slams and will face Jack Draper for a place in the final.

Sinner claimed a statement 6-2 1-6 6-1 6-4 win over Medvedev, in a rematch of this year's Australian Open final, which the 23-year-old also won.

The momentum shifted throughout - after cruising through the first set, Sinner was then put on the back foot as Medvedev took the second, with the Italian finally gaining the upper hand in the third.

Though the final set was tight, Sinner found the edge with his fifth break of the match to set up what he expects to be a tough semi-final against high-flying Draper.

"We know each other very well, we are good friends off the court," Sinner said of Draper.

"It's going to be very tough - I'm just happy to be in the semis."

Data Debrief: Sinner becomes the outright favourite

Sinner is the lone major champion remaining in the draw as he chases a second grand slam title and his first at Flushing Meadows.

In the past 20 years, 11 grand slams have seen one former major winner reach the men's singles semis. That player has gone on to win the event nine times, with Rafael Nadal (French Open, 2005) and Andy Murray (US Open, 2012) the exceptions.

Since 1990, Sinner (23 years, 19 days) is the second-youngest player to reach the semis at the Australian Open, Indian Wells, Miami and the US Open in a calendar year, after Nadal (22y 93d) in 2008.

Jessica Pegula advanced to her first-ever major semi-final, stunning Iga Swiatek in straight sets at the US Open on Wednesday.

The home favourite became the fourth American to reach the semi-finals of this year's tournament after Emma Navarro, Taylor Fritz and Frances Tiafoe.  

Pegula took advantage of the world number one's off-night, cruising through 6-2 6-4 in just under 90 minutes on Arthur Ashe Stadium.

There was little let-up for Swiatek, who lost her serve twice in quick succession at the start of the match as Pegula raced into a commanding lead, and the sixth seed recovered well after going behind in the second set to pull back in front.

And Pegula, who made just one double fault, and 22 unforced errors compared to Swiatek's 41, believes that was the difference in the quarter-final.

"I thought I played a really clean match, served pretty well, returned well," Pegula said.

"I feel like I didn't really do anything that bad and was able to kind of jump on her really early, and I think frustrate her.

"I was able to keep my level even when she picked it up in the second set."

Pegula will face Karolina Muchova for a place in the final. 

Data Debrief: Righting wrongs

Going into Wednesday's match, history was not exactly on Pegula's side as she held a 0-6 record in her previous grand slam quarter-finals. 

However, a quick start ensured that she claimed her 21st WTA top 10 win of her career - in the past four decades, only two US players have claimed more without reaching a women's singles final at a grand slam, though she will be hoping to avoid staying on that list.

Pegula is also the fourth American in the Open Era to reach the women's singles semi-finals at the Canadian, Cincinnati and US Open in a calendar year after Rosemary Casals (1970), Serena Williams (2013-15) and Sloane Stephens (2017).

Jack Draper swatted Alex de Minaur aside in straight sets to reach his maiden grand slam semi-final at the US Open on Wednesday.

World number 25 Draper has enjoyed a breakout tournament at Flushing Meadows, not dropping a set en route to becoming Britain's first US Open quarter-finalist since Andy Murray in 2016, and he carried that form into the last four.

The opening set featured three straight breaks of serve early on but it was Draper who edged that battle, dictating the tempo from deep and winning 84% of points behind his first serve as he took the opener 6-4.

De Minaur struggled to handle the 22-year-old's heavy groundstrokes as he gave up another early break in the second set, only to hit back to level things up at 4-4.

Draper, though, held his nerve after going 5-4 down, holding to love then immediately breaking to surge into a two-set lead.

He only improved from there and dominated the third set, producing one highlight-reel winner from his left hand after being forced to improvise with a series of lobs from deep.

Breaks in games five and seven brought up a chance to serve for the match, and Draper produced four outstanding points in succession to clinch his place in the last four, where he will face Jannik Sinner or Daniil Medvedev.

Data Debrief: Draper dominates again

For a player who had never previously gone beyond round two at any grand slam, the manner of Draper's progression at Flushing Meadows has been astonishing.

He has only dropped 36 games at the tournament thus far. In the last 40 years (since 1985), only Novak Djokovic (27 in 2016, 32 in 2012 and 33 in 2013) and Ivan Lendl (34 in 1987) have ever reached the men's semi-finals at the US Open while losing fewer games. 

Karolina Muchova reached the US Open semi-finals for a second straight year by beating Beatriz Haddad Maia in straight sets at Arthur Ashe Stadium.

Muchova, who was felled in the last four by eventual champion Coco Gauff last year, missed the first two grand slams of 2024 after undergoing wrist surgery, before going out in the first round at Wimbledon.

The 2023 French Open runner-up made a blistering start to Wednesday's quarter-final, though, breaking at the first two attempts and needing just over half an hour to clinch the opener 6-1.

She then appeared to struggle with illness in the second set and was broken to love immediately after registering another break of her own, with two double faults thrown in along the way.

The world number 55 rallied magnificently, though, converting the second of two break points to immediately restore her advantage at 4-3 before receiving treatment courtside. 

Haddad Maia sought treatment herself after appearing to be in distress during the very next game, but the stop-start nature of the contest did not affect Muchova, who sealed her 6-1 6-4 victory with a huge ace.

She will face either world number one Iga Swiatek or home favourite Jessica Pegula for a place in the final on Friday, with their quarter-final clash taking place later on Wednesday.

Data Debrief: Muchova's New York upturn

A trip to Flushing Meadows has proven to be just the tonic for Muchova following a difficult start to the year.

In fact, she is the first woman to reach the semi-finals of the US Open having arrived at the tournament without a single grand slam victory all season since 2020, when Jennifer Brady achieved the feat.

She is also just the second Czech player to reach the last four while winning all five of her matches in straight sets in the Open Era, after Jana Novotna, who did so in 1994 and 1998.

Alexander Zverev had "no answers" as he lamented a dismal display in his US Open loss to Taylor Fritz.

Fritz downed Zverev 7-6 (7-2) 3-6 6-4 7-6 (7-3) in the last eight on Wednesday.

In the process, Fritz reached his maiden grand slam semi-final, and will face fellow American Frances Tiafoe for a place in the showpiece match at Flushing Meadows.

World number four Zverev, meanwhile, had to lick his wounds after what he labelled a "terrible" performance.

“I played terrible," said Zverev.

"I just have no answers right now. He played quite a good match. I did nothing to deserve to win."

Matters could have not been more different for 12th seed Fritz, however.

"I feel amazing," he said. "I've had a lot of looks at quarter-finals in the past couple of years, and today just felt different.

"I really feel that it was my time to take a step further and it;s only fitting I'm doing it here on this court at the [US] Open in front of this crowd.

"Today just felt different. I really felt like it was my time to go a step further. It's only fitting I'm doing it here on this court, at the Open, in front of this crowd."

With Tiafoe also progressing to the last four, it will be the first time two Americans have played each other in the US Open semi-finals since 2005.

The last time an American man reached the final at Flushing Meadows was in 2006, when Andy Roddick lost to Roger Federer in 2006.

Frances Tiafoe will face Taylor Fritz in the semi-final of the US Open, where there will be an American in the men's final for the first time in 18 years.

After Fritz overcame Alexander Zverev, Tiafoe faced Grigor Dimitrov in a bid to tee-up an all-American semi-final in New York.

And Tiafoe was 2-1 up in sets and 4-1 up in the fourth when Dimitrov was forced to retire due to injury.

That means there is guaranteed to be an American in the final at Flushing Meadows for the first time since Andy Roddick faced Roger Federer in 2006.

"I didn't want to end it like that, for me or the crowd. But Friday is going to be one hell of a day," said Tiafoe.

"It's the biggest match of mine and Taylor's life.

"Obviously, it's not the way I wanted to get through but being in another semi-final here is incredible."

Data Debrief: Fortunate sons

This is the first time two Americans have reached, and will face each other, in the last four of a grand slam since Andre Agassi went up against Robby Ginepri in 2005, at Flushing Meadows.

Indeed, the United States has not had a men's singles major champion since Roddick triumphed at the US Open in 2003.

Aryna Sabalenka quipped the drinks would be on her to get the Flushing Meadows crowd onside for her US Open semi-final against Emma Navarro.

Home favourite Navarro will go up against a player in form in the last four, after last year's runner-up Sabalenka put on a show of force against Olympic champion Qinwen Zheng in the quarters.

Sabalenka claimed a statement 6-1 6-2 victory on Tuesday, in what was a rematch of this year's Australian Open final, which the Belarusian also won.

There was little let up for Zheng, as Sabalenka conceded fewer than five games against a WTA top-10 opponent for only the third time in her career, after wins over Coco Gauff in Indian Wells and Maria Sakkari at the WTA Finals last year.

Though Sabalenka knows that American Navarro, who followed up her win over defending champion Gauff by beating Paula Badosa, will have the crowd on her side.

"OK guys, drinks on me - and please give me some support in the next match," she laughed.

"She [Navarro] is a really good player. We had two battles, they were really close."

Sabalenka had more than just nerves to deal with against Zheng, given the great Roger Federer was watching on from the stands,

"I saw him there, saw him on the big screen," Sabalenka said regarding Federer, a five-time US Open champion.

"I was like, OK, I have to play my best tennis so he enjoys it. I have to show my skills, you know, slice skills, come to the net and all that stuff."

Data Debrief: Four on the spin for Sabalenka

Sabalenka has now reached four successive US Open semi-finals, as she takes her tally of last four appearances at grand slams to nine.

At the age of 26, she is the youngest woman to reach four straight semi-finals at Flushing Meadows since 2002.

She is the also first player to reach the women's singles semis at both the Australian Open and US Open in back-to-back years since Serena Williams (2015-16).

Home hopeful Taylor Fritz reached his first ever grand slam semi-final at the US Open, beating world number four Alexander Zverev in four sets at Flushing Meadows. 

Fritz, who had lost his previous four grand slam quarter-finals, came through tie-breaks in the first and fourth set to emerge a 7-6 (7-2) 3-6 6-4 7-6 (7-3) victor.

Both players traded blows in the opening set, with Fritz squandering the opportunity to take the opener in the 12th game after missing three set points, only to go on and win the tie-break. 

Zverev continued to match his American opponent stride for stride, but struck the decisive blow in the second set with a break point in the eighth game to level the encounter.

But backed by a raucous crowd inside Flushing Meadows, Fritz raced into a 3-0 lead in the third and despite Zverev finding a break of his own, he was unable to stop the world number 12 going within touching distance of victory. 

With the atmosphere intensifying, a second tie-break of the game would decide whether the encounter went the distance, with Zverev pulling the final ball wide to claim a famous win for Fritz at the Arthur Ashe Stadium.

Fritz could play fellow American Frances Tiafoe for a place in a first grand slam final, with Tiafoe squaring off against Grigor Dimitrov in Tuesday's night session.

Data Debrief: Fritz hits the heights

Defeating Zverev at the age of 26y 310d, Fritz has become the oldest American in the Open Era to reach their maiden men's singles SF at the US Open.

It was the 12th-seeded Fritz's fourth win over an ATP top-10 player in a major this season, the most by an American man in one year since Andre Agassi had five in 1999.

Home hopeful Taylor Fritz reached his first ever grand slam semi-final at the US Open, beating world number four Alexander Zverev in four sets at Flushing Meadows. 

Fritz, who had lost his previous four grand slam quarter-finals, came through tie-breaks in the first and fourth set to emerge a 7-6 (7-2) 3-6 6-4 7-6 (7-3) victor.

Both players traded blows in the opening set, with Fritz squandering the opportunity to take the opener in the 12th game after missing three set points, only to go on and win the tie-break. 

Zverev continued to match his American opponent stride for stride, but struck the decisive blow in the second set with a break point in the eighth game to level the encounter.

But backed by a raucous crowd inside Flushing Meadows, Fritz raced into a 3-0 lead in the third and despite Zverev finding a break of his own, he was unable to stop the world number 12 going within touching distance of victory. 

With the atmosphere intensifying, a second tie-break of the game would decide whether the encounter went the distance, with Zverev pulling the final ball wide to claim a famous win for Fritz at Arthur Ashe Stadium.

Fritz could play fellow American Frances Tiafoe for a place in a first grand slam final, with Tiafoe squaring off against Grigor Dimitrov in Tuesday's night session.

Data Debrief: Fritz hits the heights

Defeating Zverev at the age of 26y 310d, Fritz has become the oldest American in the Open Era to reach their maiden men's singles SF at the US Open.

It was the 12th-seeded Fritz's fourth win over an ATP top-10 player in a major this season, the most by an American man in one year since Andre Agassi had five in 1999.

Home hopeful Taylor Fritz reached his first ever grand slam semi-final at the US Open, beating world number four Alexander Zverev in four sets at Flushing Meadows. 

Fritz, who had lost his previous four grand slam quarter-finals, came through tie-breaks in the first and fourth set to emerge a 7-6 (7-2) 3-6 6-4 7-6 (7-3) victor.

Both players traded blows in the opening set, with Fritz squandering the opportunity to take the opener in the 12th game after missing three set points, only to go on and win the tie-break. 

Zverev continued to match his American opponent stride for stride, but struck the decisive blow in the second set with a break point in the eighth game to level the encounter.

But backed by a raucous crowd inside the Flushing Meadows, Fritz raced into a 3-0 lead in the third and despite Zverev finding a break of his own, he was unable to stop the world number 12 going within touching distance of victory. 

With the atmosphere intensifying, a second tie-break of the game would decide whether the ecnounter went the distance, with Zverev pulling the final ball wide to claim a famous win for Fritz at Arthur Ashe Stadium.

Fritz could play fellow American Frances Tiafoe for a place in a first grand slam final, with Tiafoe squaring off against Grigor Dimitrov in Tuesday's night session.

Data Debrief: Fritz hits the heights

Defeating Zverev at the age of 26y 310d, Fritz has become the oldest American in the Open Era to reach their maiden men's singles SF at the US Open.

It was the 12th-seeded Fritz's fourth win over an ATP top-10 player in a major this season, the most by an American man in one year since Andre Agassi had five in 1999.

Emma Navarro is ready for the challenge of either Aryna Sabalenka or Zheng Qinwen as she bids for US Open glory at Flushing Meadows. 

Navarro, who had never made it past the first round in her previous appearances at New York, put on an impressive display to win in straight sets against Paula Badosa.

The American found herself 5-1 down in the second set, only to win the next six games in a row to reach her maiden grand slam semi-final. 

She also became the second American player since 2000 to make their first grand slam women's singles semi-final at the US Open, after Jennifer Brady did so in 2020. 

But waiting in the next round is last year's runner-up, Sabalenka, or the recently crowned Olympic champion Zheng, a challenge Navarro is not shying away from.

"I've played both of them a couple of times,” said Navarro. “They are great players, I think we will have a great battle. But I'll be up for the challenge of either of them.

"Both big servers, big hitters and I think they will come aggressively at me whichever one it is - but yeah I'll be ready."

Navarro had only won one match at the main stage of a grand slam before this year, but has got better and better throughout her breakout year of 2024.

She reached the third round of the Australian Open, the last 16 at the French Open, the quarter-finals at Wimbledon and now the semi-finals of her home slam.

"After I got it back to 5-2, I had a bit of an inkling that it might be two sets," added Navarro.

"I just wanted to stay really tough and stick in there and even if I did lose the second set, I wanted to set the tone for the third set.

"Just really happy with my performance today. Crazy to be moving on to the semi-finals. US Open baby."

Emma Navarro is ready for the challenge of either Aryna Sabalenka or Zheng Qinwen as she bids for US Open glory at Flushing Meadows. 

Navarro, who had never made it past the first round in her previous appearances at New York, put on an impressive display to win in straight sets against Paula Badosa.

The American found herself 5-1 down in the second set, only to win the next six games in a row to reach her maiden grand slam semi-final. 

She also became the second American player since 2000 to make their first grand slam women's singles semi-final at the US Open, after Jennifer Brady did so in 2020. 

But waiting in the next round is last year's runner-up, Sabalenka, or the recently crowned Olympic champion Zheng, a challenge Navarro is not shying away from.

"I've played both of them a couple of times,” said Navarro. “They are great players, I think we will have a great battle. But I'll be up for the challenge of either of them.

"Both big servers, big hitters and I think they will come aggressively at me whichever one it is - but yeah I'll be ready."

Navarro had only won one match at the main stage of a grand slam before this year, but has got better and better throughout her breakout year of 2024.

She reached the third round of the Australian Open, the last 16 at the French Open, the quarter-finals at Wimbledon and now the semi-finals of her home slam.

"After I got it back to 5-2, I had a bit of an inkling that it might be two sets," added Navarro.

"I just wanted to stay really tough and stick in there and even if I did lose the second set, I wanted to set the tone for the third set.

"Just really happy with my performance today. Crazy to be moving on to the semi-finals. US Open baby."