Emma Navarro staged a stunning second-set comeback against Paula Badosa to reach her first career grand slam semi-final at the US Open on Tuesday.

The American looked to be heading to a decider but put together an incredible run to win 6-2 7-5 on Arthur Ashe Stadium in 74 minutes.

Navarro had never made it past the first round in her previous appearances at Flushing Meadows but has followed up her Wimbledon quarter-final run with another impressive showing.

Badosa, who has been on a recent resurgence with her title in Washington last month, struggled to gain a foothold, losing her serve twice in the first set and failing to get a break in the penultimate game.

She looked back to her usual self in the second though, racing into a commanding 5-1 lead, only to see it slip away from her.

Buoyed by her home crowd, Navarro won the next six games in a row to set up a meeting with either Qinwen Zheng or Aryna Sabalenka in the next round.

Data Debrief: Breaking new ground

It has already been quite the year for Navarro, winning her first WTA Tour title in Hobart in January before reaching her first grand slam quarter-final in Wimbledon.

But her performance in her home tournament has the potential to be the pick of the year. Into her first major semis, she is also now guaranteed a top-10 debut next week.

Navarro is the sixth player in the last 40 years to make the women's singles semi-finals at the US Open without a win at the event entering the tournament, after Steffi Graf (1985), Venus Williams (1997), Yanana Wickmayer (2009), Bianca Andreescu (2019) & Emma Raducanu (2021).

Aryna Sabalenka "doesn't want to leave" the US Open as she bids to reach a fourth consecutive semi-final at Flushing Meadows.

The Belarusian beat Elise Mertens to reach the quarter-finals, with Olympic gold medallist Qinwen Zheng standing between her and a place in the final four.

It is the second time the pair will meet in 2024 after Sabalenka overcame Zheng in straight sets to win her second consecutive Australian Open title in January.

Sabalenka reached the final of the US Open last year, losing out to Coco Gauff, who was knocked out in the fourth round, leaving the 26-year-old as one of the favourites to clinch the title this year.

"I really enjoy playing on these big stadiums," Sabalenka said.

"I feel all the support. I just don't want to leave early here.

"I just want to stay as long as I can and enjoy this beautiful court and beautiful atmosphere."

Sabalenka is the first player to make the quarter-finals at the US Open in women's singles for 4+ consecutive years since Serena Williams (six in a row between 2011 and 2016).

And she will be looking to emulate the American's record of reaching the semi-finals in 4+ consecutive years on Tuesday.

Jannik Sinner is anticipating a gruelling US Open quarter-final clash with Daniil Medvedev after producing some of his best tennis of the year to beat Tommy Paul in the fourth round.

Sinner made a slow start against the home favourite in front of a raucous crowd at Arthur Ashe Stadium, swiftly going two breaks down before recovering his composure.

He needed tie-breaks to take the first two sets but produced a mesmerising display in the third, wrapping up a 7-6 (7-3) 7-6 (7-5) 6-1 victory to ensure he has reached at least the quarter-finals of all four grand slams in 2024.

Sinner has also made the last eight at his first 12 ATP-level events this year. At the age of 23 years and 17 days, he is the second-youngest man to achieve that feat in the Open Era, after Jimmy Connors in 1974 (21 years, 290 days).

While early exits for Carlos Alcaraz and Novak Djokovic have seen the opposite side of the draw open up, things do not get any easier for the world number one as he faces Medvedev next.

The Russian, who won the 2021 edition of the US Open, trounced Nuno Borges 6-0 6-1 6-3 in his own fourth-round matchup and has won 11 straight sets of tennis.

Sinner, meanwhile, has struggled with hip problems throughout the season and was seen clutching the area after stumbling during one long rally versus Paul.

He is hopeful of overcoming that concern ahead of Wednesday's quarter-final but knows he will be pushed all the way by Medvedev.

"For sure mentally I didn't start very well. I was a double break down in the first set. I tried to stay there mentally and for sure this was one of the keys to win this match," Sinner said. 

"I served very well in the beginning of the match. There are some ups and downs obviously in best of five, it's normal to have that. 

"But finding my rhythm in the end of the match hopefully helps for the next match, so let's see.

"There's going to be a lot of rallies so hopefully I'll be ready physically. We'll try to do our best on court and hopefully you guys enjoy it."

The winner of Sinner's clash with Medvedev will face either Jack Draper or Alex de Minaur for a spot in the final, with the former reaching his maiden grand slam quarter-final by beating Tomas Machac 6-3 6-1 6-2.

Draper, who is the first British man to make the quarter-finals at Flushing Meadows since Andy Murray in 2016, told Sky Sports after his win: "I feel amazing being in the last eight.

"My first quarter-final, it means the absolute world to me. I've definitely felt more and more confident in myself."

Iga Swiatek believes she is growing into the US Open and improving with each day that passes after storming into the quarter-finals by beating Liudmila Samsonova.

Five-time grand slam winner Swiatek is hunting her second title at Flushing Meadows, and she will face home favourite Jessica Pegula in the last eight after overcoming Samsonova 6-4 6-1.

She needed just over an hour and a half to see off the 16th seed on Monday in what represented her 100th main-draw match at grand slams.

Among those to begin their careers in the Open Era, only six female players have bettered Swiatek's total of 83 victories through their first 100 major outings.

Monica Seles managed 93 wins, putting her ahead of Chris Evert (90), Steffi Graf (87), Martina Hingis, Serena Williams (both 86) and Venus Williams (85).

Swiatek is also one of just four players in the last two decades to win 12 straight grand slam matches versus WTA top-20 opponents, alongside Graf, Seles and Serena Williams.

She still believes there is more to come, though, as she approaches Tuesday's headline tussle with sixth seed Pegula.

"At the beginning, I felt like we were playing men's style, just holding our serves but I knew that if I kept pushing I may get some chances to break," Swiatek said. 

"That happened and I'm happy I was there to close the first set. Then I just wanted to keep being focused and not let my mind drift off.

"I'm happy with the whole performance. I'm feeling better and better every day."

The victor of Swiatek's meeting with Pegula will face Karolina Muchova or Beatriz Haddad Maia for a place in the final, after the former upset Jasmine Paolini and the latter overcame Caroline Wozniacki.

Haddad Maia's' 6-2 3-6 6-3 win over Wozniacki – who won the 2018 Australian Open – made her just the second South American woman to claim multiple US Open victories over former grand slam winners (two), alongside Argentina's Gabriela Sabatini.

Daniil Medvedev breezed into the US Open quarter-finals with a commanding straight-sets win over Nuno Borges on Monday.

As the only former men's champion still in the competition, the Russian put out a statement with his 6-0 6-1 6-3 victory in just one hour and 48 minutes on Arthur Ashe Stadium.

Medvedev showed his intent early in the match, winning every game in the first set as Borges failed to find his footing and struggled to put the 2021 champion under any pressure.

The Portuguese did win his first game at the start of the second set, but Medvedev was soon back in control, going on another six-game winning streak to put him out of sight.

Borges finally showed some fight in the final set, though it was too little too late. He got his first, and only, break of the match, but could not push his advantage as the world number five claimed two of his own to book his place in the next round.

He will face either world number one Jannik Sinner or Tommy Paul in the next round at Flushing Meadows. 

Data Debrief: Statement of intent

Since losing the second set of his first match in New York, Medvedev has not looked back, going on to win every single one since.

Borges barely laid a hand on him in the fourth round though, as Medvedev stayed on top by successfully converting eight break points - he has now converted 29 such points at the US Open this year, the most of any player.

Since 2019, when the 28-year-old reached the quarter-finals of the US Open for the first time, no player has reached this stage more in men's singles than Medvedev (five).

Jessica Pegula is through to the quarter-finals of the US Open after beating Diana Shnaider in straight sets on Monday.

She ensured she would not suffer a second consecutive fourth-round exit at Flushing Meadows, winning 6-4 6-2 in 88 minutes on Arthur Ashe Stadium.

The American is on a hot streak since the tour returned to the North American hard courts, having already won the Canadian Open before reaching the final in Cincinnati, only to lose out to Aryna Sabalenka.

Pegula staunchly defended four break points in the second game, but three consecutive breaks put her in control of the first set despite Shnaider's spirited fight back.

The Russian, who is the youngest player to reach this year's fourth round, could not maintain that level n the second though, as Pegula got another two breaks in the second set and won the last three games to ensure she would go into the final eight.

Pegula will face either world number one Iga Swiatek or Liud Samsonova in the next round as she bids to reach a first-ever grand slam singles semi-final.

Data Debrief: Home advantage

Having failed to get past the second round at both the Australian Open and Wimbledon in 2024, Pegula has already beaten her best grand slam result of the year.

She has now reached the quarter-finals of Canada, Cincinnati and the US Open in the same year for the second time in her career (also 2022). She is one of just four women to achieve this across multiple seasons during the Open Era.

Pegula is 13-1 on hard court this year, and will be hoping she can continue her impressive run, especially having gone 0-6 in her previous grand slam quarter-finals.

Aryna Sabalenka continued her quest for US Open redemption as she reached another quarter-final at Flushing Meadows with a straight-sets victory over Elise Mertens.

A year after her defeat to Coco Gauff in the showpiece match of the competition, Sabalenka watched on as the defending champion exited the competition following defeat to Emma Navarro before she took to the court. 

But the Belarusian ensured there would be no upset on this occasion, needing an hour and 36 minutes to win 6-2 6-4 as she progressed to her fourth consecutive quarter-final at the tournament.

On her way to victory, Sabalenka struck 41 winners compared to her Belgian opponents' 14, and said she is relishing the opportunity of playing in New York this time around.

"I really enjoy playing here,” Sabalenka said. “The crowd are amazing. I really enjoy playing on these big stadium and feel all the support.

“I just don’t want to leave early here. I just want to stay as long as I can and enjoy this beautiful court.

“I think that’s why I’m consistently here.”

Sabalenka will face China's Olympic champion Zheng Qinwen, who beat silver medallist Donna Vekic 7-6 (7-2) 4-6 6-2, in the last eight in what is a repeat of their Australian Open final earlier this year.

Data Debrief: Sabalenka, queen of Flushing Meadows

Sabalenka has claimed her 25th women's singles match win at the US Open. Since 2000, only Kim Clijsters (30) has managed 25 wins at the event in fewer matches than the Belarusian (31).

She has now reached a 10th career women's singles quarter-final at grand slam events. Since the start of the 2020 season, Sabalenka has also become the first player to reach 10 or more women's singles quarter-finals.

Sabalenka also reached a fourth consecutive women’s singles quarter-final at the US Open, becoming the first player to achieve the feat since Serena Williams, who made six straight quarter-finals between 2011 and 2016.

Defenidng US Open champion Coco Gauff was dumped out of the competition on Sunday, blaming a lack of execution in her defeat to fellow American Emma Navarro.

Gauff, who was also comfortably beaten by Navarro at Wimbledon two months ago, fell to a 3-6 6-4 3-6 loss after serving 19 double faults at the Arthur Ashe Stadium.

A bright start from Navarro saw earn a first break in the opening game after two double faults by Gauff in a sign of things to come for the world number three.

Despite a comeback in the second set, Gauff's remaining service games were punctuated by more errors in the third, serving 11 of her total double faults in the final set to hand Navarro the victory. 

"I fought really hard today. I just didn't take care of my serve, so that was the biggest difference," Gauff said.

"Mentally and emotionally I gave it my all. Of course, there were things execution-wise, where I wish I could serve better.

"I think if I would did that, it would have been a different story for me in the match."

Navarro will go on to play 26th seed Paula Badosa in the last eight after the Spaniard thrashed China’s Wang Yafan 6-1 6-2 earlier on Sunday.

Data Debrief: Doubles troubles for Gauff

With 19 double faults, Gauff served the equal-most double faults for her career in a single WTA main draw match, serving as many against Martina Trevisan at Roland Garros in 2020.

Navarro is the first American player to defeat the women’s singles defending champion at the US Open since Serena Williams in 2002 against Venus Williams in the final.

She is also now the player with the most hard court WTA quarter-finals in 2024 (seven, surpassing Elena Rybakina).

Daniil Medvedev restored order by beating Flavio Cobolli in the US Open evening session, avoiding the same fates as former champions Novak Djokovic and Carlos Alcaraz.

The Russian, who is now the only former champion remaining in the men's field at Flushing Meadows, won 6-3 6-4 6-3 in two hours and 18 minutes.

Though Cobolli fought well, getting the first break in the match early on and valiantly defending set point six times in the first two sets, he could not stage another upset.

Medvedev struck 33 winners as he asserted his dominance and will meet Nuno Borges in the fourth round in New York.

"I said it before the match that for me the upsets don't really matter," Medvedev said.

"The only thing [is when] the conditions are a bit tricky, the favourites maybe have less margin than the other guys. Just have to be more cautious.

"It was a tough match. It was just a little bit up and down, and at one moment I started playing much better on my serve than on his.

"If I play good tennis I can win the whole thing. If I don't play good, I can lose against anyone."

Data Debrief: No upsets here

With two of the favourites for the title already out of the race, Medvedev will feel good about his chances of winning a second US Open title.

This victory was his 138th combined match win on hard court (grand slams and ATP Masters 1000 events), equalling Roger Federer for the second-most of any player on the surface in the past decade, trailing only Novak Djokovic (227). 

Medvedev is into the fourth round for the 11th time in the men's singles event at grand slams on hard court - he is the only Russian in the Open era to reach this stage 10+ times. 

Iga Swiatek cruised into the fourth round of the US Open, crediting a chat with Serena Williams for her straight-sets win over Anastasia Pavlyuchenkova.

The world number one prevailed 6-4 6-2, without facing a break point in Arthur Ashe Stadium on Saturday.

Swiatek needed just 95 minutes to get into the next round, setting up a meeting with Liudmila Samsonova.

A four-game winning streak in the second set put the game beyond doubt, earning her a third straight-sets victory of the tournament so far.

"It was nice that Serena [Williams] approached me [in the players' gym], because I wouldn't, for sure, find courage to do that," Swiatek said.

"Even though we met before and for a couple of years we have been on the same sides and on tour together, she's still star-striking for me.

"It inspired me, and it gave me a positive kick.

"It's not like my tennis is perfect, but it is weird because I have been number one and winning tournaments, I feel I need to work on some stuff."

Data Debrief: Total dominance

Swiatek, who won at Flushing Meadows in 2022, is into the fourth round at a grand slam for just the second time this year, having failed to reach it at the Australian Open and Wimbledon.

It is the 16th time she has reached that stage in her 23rd main draw appearance - only Coco Gauff has also reached the fourth round in over half of her main draws at grand slams among active players.

The Pole looks to be in fine form though, with this victory lifting her winning percentage to 82.8% (82-17) in women's singles matches at grand slam events - she is now up to 11th on the all-time list in the Open Era, surpassing Martina Hingis.

Jannik Sinner beat Australia's Christopher O'Connell in straight sets to reach the fourth round of the US Open on Saturday, avoiding a similar fate to Carlos Alcaraz and Novak Djokovic.

The men's draw at Flushing Meadows has been blown wide open by early exits for Alcaraz and Djokovic, but the top seed remains in the hunt after a composed performance.

He reached the fourth round for a fourth consecutive year with a routine 6-1 6-4 6-2 victory, setting the tone with several huge groundstrokes in the opening set.

O'Connell never looked likely to fight back as Sinner smashed 46 winners in a ruthless performance, wrapping up his win in one hour and 56 minutes.

The Australian Open champion will face either Tommy Paul or Gabriel Diallo for a place in the last eight, and he was relieved to survive an opening week full of surprises.

"Everything can happen in this sport, so I try to stay on my side of the net and I'm trying to take the tournament day by day," Sinner said in his on-court interview after the win. 

"Each opponent is a very tough challenge and [I am] also enjoying every moment on the court. There have been already a couple of upsets, so let's see what's coming.

"But I'm very happy to still be here and hopefully I can play as many matches as possible. But as I said, we go day by day and then we'll see how it goes."

Data Debrief: Sinner heating up

Sinner lost his first set of the tournament to Mackenzie McDonald but has been largely untouchable since then.

He has only lost 18 games across his last nine sets of tennis, an average of two per set.

The Italian's winning streak now stands at seven straight matches, meanwhile, following his triumphant Cincinnati Open run.

Aryna Sabalenka came from a set down to keep her US Open dream alive as she beat Ekaterina Alexandrova in the early hours at Flushing Meadows. 

Sabalenka emerged on court at the Arthur Ashe Stadium at seven minutes past midnight following Novak Djokovic's shock exit from the tournament, and consecutive upsets looked to be on the cards. 

However, the Belarusian responded from a disappointing opening set as she looks to avenge her defeat in the showpiece match against Coco Gauff a year ago.

The world number two set up a meeting with Belgium's Elise Mertens as she emerged a 2-6 6-1 6-2 victor in one hour and 40 minutes in New York. 

"I don't know what I did, I was just trying to stay low, put as many balls as I can back on that side," Sabalenka said. 

"She played incredible tennis in the first set. It was really tough to change it."

"I'm really happy I was able to turn around this match and get this really difficult win. Thanks so much for staying that late."

Data Debrief: Sabalenka survives late, late show

Sabalenka's encounter with Alexandrova was the latest starting match at the US Open, beating Gabriela Sabatini and Beverley Bowes' meeting in 1987 that started at midnight.

The Belarusian, however, will be hoping for a much improved performance in the next round, having produced 27 unforced errors throughout the contest and serving four double faults.

Defending US Open champion Novak Djokovic suffered a shock exit at Flushing Meadows as he lost in four sets to Alexei Popyrin. 

Djokovic arrived at the tournament with confidence following his gold medal triumph at the Paris Olympics, and was tipped to lift a record-extending 25th grand slam title.

However, the Serbian's hopes of a fifth success in New York were dashed as he followed fellow favourite Carlos Alcaraz out of the competition in the third round. 

Popyrin emerged victorious in three hours and 18 minutes, prevailing 6-4 6-4 2-6 6-4 to confirm Djokovic's earliest exit from the tournament in 18 years.

"I have played some of the worst tennis I have ever played," Djokovic said.

"Honestly, the way I felt and the way I played from the beginning of this tournament, third round is a success."

"I tried my best, I didn't have any physical issues. I just felt out of gas, and you could see that. From the first match, I just didn't find myself on this court.

"Life moves on. I'll try to recalibrate and look forward to what's next."

Data Debrief: Another one bites the dust

Djokovic was far from his clinical best, serving a career-high 14 double faults in a grand slam match and committing 49 unforced errors.

The Serbian will also end the year without winning a grand slam title, the first time he has done so since 2017.

But the day belonged to Popyrin, saving 12 of the 16 break points he faced against the world number two, finding particular success with his forehand as 31 of his 49 winners came from that shot.

Defending US Open champion Novak Djokovic suffered a shock exit at Flushing Meadows as he lost in four sets to Alexei Popyrin. 

Djokovic arrived at the tournament with confidence following his gold medal triumph at the Paris Olympics, and was tipped to lift a record-extending 25th grand slam title.

However, the Serbian's hopes of a fifth success in New York were dashed as he followed fellow favourite Carlos Alcaraz out of the competition in the third round. 

Popyrin emerged victorious in three hours and 18 minutes, prevailing 6-4 6-4 2-6 6-4 to confirm Djokovic's earliest exit from the tournament in 18 years.

"I have played some of the worst tennis I have ever played," Djokovic said.

"Honestly, the way I felt and the way I played from the beginning of this tournament, third round is a success."

"I tried my best, I didn't have any physical issues. I just felt out of gas, and you could see that. From the first match, I just didn't find myself on this court.

"Life moves on. I'll try to recalibrate and look forward to what's next."

Data Debrief: Another one bites the dust

Djokovic was far from his clinical best, serving a career-high 14 double faults in a grand slam match and committing 49 unforced errors.

The Serbian will also end the year without winning a grand slam title, the first time he has done so since 2017.

But the day belonged to Popyrin, saving 12 of the 16 break points he faced against the world number two, finding particular success with his forehand as 31 of his 49 winners came from that shot.

Coco Gauff rallied after a slow start in the US Open third round, staging a comeback win over Elina Svitolina to keep her title defence alive.

The American dug deep, altering her approach to claim a 3-6 6-3 6-3 victory over the Ukrainian in just over two hours on Friday.

It was an even start to the match as both players tried to figure out their opponent, and Svitolina struck first, winning the final three games in the first set to take the lead.

Having successfully defended three break points during the first set, Svitolina could not maintain her momentum, with Gauff finding her footing, and getting the vital break in the sixth game to stretch into a lead that forced a decider.

After a strong start to the third set, the world number three failed to convert match point three times in the penultimate game but eventually got over the line with another break in the next.

After claiming her 60th win at grand slams, Gauff will face either Emma Navarro or Marta Kostyuk in the next round. 

Data Debrief: Gauff defies age again

Gauff was certainly made to work hard for the victory, but in doing so, she became the youngest player to win 10+ consecutive women's singles matches at the US Open since Serena Williams (11 wins in a row between 1999 and 2000).

She is also the player with the joint-most wins at the US Open in women's singles this century before turning 21, equalling Maria Sharapova and Serena Williams with 17.

Gauff has now reached the fourth round in every grand slam this year, making her just the second player in the last 10 years to achieve that feat before the age of 21, after Iga Swiatek