Alexander Zverev was unable to pull off another five-set victory at the US Open as an error-strewn performance condemned him to a fourth-round loss to Diego Schwartzman marked by an umpiring controversy.

Zverev won the first set at Arthur Ashe Stadium in straightforward fashion but fell victim to a tremendous comeback from Schwartzman, who progressed to his second quarter-final in three years at Flushing Meadows.

Schwartzman came through 3-6 6-2 6-4 6-3 in over three hours, demonstrating devastating power off both wings and great touch at the net in a superb showing.

By contrast, Zverev's display was well below the standard that has seen him become established as one of the best young talents on the ATP Tour.

The 22-year-old has yet to make the breakthrough most expect of him, and his defeat on Monday owed to 65 unforced errors and 17 double faults.

Zverev was also docked a point that cost him the seventh game of the fourth set, allowing Schwartzman to go up 5-2, after being assessed a second code violation, the German left furious having claimed he did not hear the first.

Schwartzman wrapped up the win with a rasping forehand and will play either Rafael Nadal or Marin Cilic next.

On the prospect of playing Nadal, he told ESPN: "He's my friend, it's always great to play against him in quarter-finals of grand slams."

Naomi Osaka has not always dealt with defeat as well as she did at the US Open on Monday.

Her post-match news conferences following losses at Roland Garros and Wimbledon were much different affairs to the laid back discussion she had with the media after her fourth-round straight-sets loss to Belinda Bencic.

"In Wimbledon I walked out on you guys," Osaka joked. "In Roland Garros, I came straight from the match, so I was all gross and I just wanted to get out of there."

The reason for Osaka's change in reaction to being beaten stems from the events of Saturday in New York, when she won the hearts of sports fans around the world by convincing a tearful Coco Gauff to do a joint on-court interview with her after their third-round clash at Arthur Ashe Stadium.

Osaka's sportsmanship and empathy was widely lauded, and the 21-year-old, who saw her title defence and reign as world number one ended by Bencic, believes the tournament and the experience she shared with Gauff has had a transformative effect on her.

"For me, right now I have this feeling of sadness, but I also feel like I have learned so much during this tournament. Honestly, of course I wanted to defend this tournament," she said.

"I feel like the steps that I have taken as a person have been much greater than, like, I would imagine at this point. So I hope that I can keep growing. I know that if I keep working hard, then of course I'll have better results.

"I feel like I'm more chill now. I feel like I grew. I don't feel like I put so much weight on one single match."

Osaka conceded to being surprised by the level of reaction on social media to her touching moment with Gauff, and by the extra support it earned her in the Bencic match.

However, the added backing could not help her overcome her opponent, with Osaka refusing to blame a knee problem for which she took a painkiller after going down a break in the second set.

"It was kind of weird. Yeah, I definitely felt like people were cheering for me more, which I appreciate. Yeah, it was kind of unexpected," she added.

"I hurt my knee in Cincinnati, but it's getting better. I don't want to say that that's the reason that I lost, because I obviously had played, like, three matches before this.

"The knee was a little bit annoying in the movement aspect, but I think that that's something I should have overcome in a way that I either should have started playing more aggressively or just, like, tried to, like, hit at a higher length.

Osaka, who also revealed she has not practiced serving due to being unable to land on her left leg, will have plenty of time to dissect what went wrong against Bencic as she prepares for the Asia swing and the fight for the year-end number one ranking.

However, for now the two-time grand slam champion appears more content to reflect on the many positives from a tournament that has had a greater impact on her personal development than either of those two triumphs.

Belinda Bencic produced a stunning performance to end Naomi Osaka's title defence at the US Open in the fourth round and bring her stint at the top of the world rankings to a close. 

Osaka won plaudits for her class on and off the court in the third round, persuading an emotional Coco Gauff to do a joint interview in front of the Arthur Ashe Stadium crowd after her straight-sets win over the 15-year-old American.

As a result she had plenty of backing under the roof of the same arena, but that did not inspire her to victory in the face of a magnificent showing from Bencic.

The Swiss had won her two previous meetings with Osaka, defeating her in Indian Wells and Madrid. Having had the benefit of Anett Kontaveit's withdrawal from her third-round tie, Bencic continued her hoodoo over the Japanese in fine style.

She completed a 7-5 6-4 triumph in one hour and 27 minutes, reaching only her second grand slam quarter-final with a win that ensures Ashleigh Barty will replace Osaka at the top of the WTA rankings.

Bencic quickly hit the ground running and opened up a 2-0 lead in the first set, only for Osaka to reel off three straight games.

Any thought that normal service had been resumed proved misguided, however, and Bencic struck again as she nailed a passing shot to break before wrapping up the set when Osaka returned a serve out wide into the net.

The world number 12 did a tremendous job of extending the rallies and brought up triple break point in the fifth game of the second with another astonishing pass at the end of a remarkable rally.

Osaka subsequently sent down a double fault and then called for the trainer. She carried on but was unable to make the inroads needed to restore parity as Bencic secured arguably the biggest win of her career, celebrating arms aloft as her opponent directed a tame off-balance forehand into the net.

Bencic will next face Donna Vekic, who overcame Julia Goerges in three sets, in a match between two players looking to reach the semi-final of a slam for the first time.

It has been a long road back to the top of men's tennis for Novak Djokovic, which will have made another betrayal by his body sting all the more on Sunday.

What may be even more painful for the world number one, however, is the realisation he could be about to lose ground in the race for his ultimate goal: the all-time record for men's grand slam singles titles.

Djokovic has made no secret of his desire to beat Roger Federer's leading tally, which stands at 20. However, his retirement due to a left shoulder injury after being thoroughly dismantled by Stan Wawrinka in the fourth round of the US Open has made that challenge even harder.

Through his struggles with an elbow problem, Djokovic saw eight slams go by without him lifting any of them, with six shared between Federer and Nadal.

That set him back significantly in his quest to take Federer's crown as the greatest of all time, and he will know his withdrawal makes it highly likely the Swiss star or Nadal will be collecting the US Open trophy come the end of the second week of proceedings at Flushing Meadows.

Federer and Nadal will be the heavy favourites to contest the final, with the former having the chance to move onto 21 and Nadal the opportunity to pull to within one of him on 19.

Djokovic does not believe this latest setback to be a long-term issue - he plans to play in Tokyo in four weeks' time - and was defiant when asked in his post-match media conference about his dream of catching Federer and Nadal.

"It's a long road ahead hopefully for me," Djokovic said. "I hope I can play for many more years. I'm planning to. I mean, I don't see an end behind the corner at all.

"Now it's a matter of keeping my body and mind in shape and trying to still peak at these kind of events that are majors and that are the most significant in our sport."

However, keeping his body in shape has proven easier said than done for Djokovic. This was his sixth retirement at a slam, albeit his first at the US Open, and at 32 it is easy to question just how long he will be able to remain at the highest level given that record of durability problems in majors.

Barring a breakthrough for Daniil Medvedev or perhaps a continuation of the Wawrinka resurgence in New York this week, Djokovic's task of claiming the slam record will be a more difficult one going into the 2020 season.

Having seen the career of Andy Murray – who is just seven days younger than Djokovic – completely derailed by injury, the Serbian should have an understanding that his time as one of the best in the world can be brought to an end at any moment.

By contrast, he will also be encouraged by the manner in which the now 38-year-old Federer has been able to extend his time as a grand slam champion well beyond the expected twilight of his career.

Federer, though, has been able to achieve that by reducing his playing schedule. The 2019 season was the first in which Federer has played the French Open since 2015 and he has only featured in 10 tournaments all year. 

Djokovic's insistence that he plans to play in Tokyo despite saying he has been in "constant pain" for weeks indicates he believes he can continue to have a very busy schedule and compete in grand slams.

His body is telling him otherwise.

The 16-time major winner is not one for giving up, which is what made his retirement against Wawrinka all the more surprising.

However, unless he accepts shifting to a lighter schedule is the best policy as he moves into his mid-30s, Djokovic may have to resign himself to the prospect of his moving to the top of the major pile never coming to pass.

Stan Wawrinka could see Novak Djokovic was struggling with his shoulder but was still surprised the world number one retired from their fourth-round match at the US Open.

Wawrinka produced a superb performance at Arthur Ashe Stadium, taking the first two sets 6-4 7-5 and leading 2-1 in the third before Djokovic succumbed to his shoulder problem on Sunday.

Djokovic double-faulted to gift Wawrinka a break early in the third set, before which the Serb had received treatment on the shoulder that hindered him in a second-round clash with Juan Ignacio Londero.

That prompted defending champion Djokovic to concede the match, giving Wawrinka a place in the quarter-finals, where he will face Daniil Medvedev.

Asked if he could sense something wrong with Djokovic in a rematch of the 2016 final won by the Swiss, Wawrinka told a media conference: "For me, my sense, I was feeling good on the court. I was playing well.

"The more the match was going, better I was playing, I was hitting really hard the ball. I was feeling great on the court. That's the most important.

"For sure I could see some little thing that he was in trouble. But I was most likely, most of the time, focused on myself because I know how well he can fight.

"I know how well he can come back. Doesn't matter how he's feeling on the court, and that's what I was focusing on."

"Yeah, it was," Wawrinka said when asked if the retirement was a shock. "It's always a surprise, for sure, when you play a champion like him.

"You always expect to play against the best of Novak. I saw he wasn't feeling great, but again, it was a surprise, for sure."

Djokovic was booed by large sections of the Arthur Ashe Stadium crowd as he left the court, a turn of events that also had Wawrinka taken aback in New York.

"[I'm] always surprised when you play the number one and you hear the fans booing him when he had to retire, that's for sure," he added.

"He's a good friend. I know him really well. He's [an] amazing champion, and if he has to retire, it's not the best for a tennis player to have to leave the court like that."

Wawrinka will likely have the crowd on his side against Medvedev, who has revelled in boos during his last two matches after being seen to direct a middle-finger gesture to the crowd in his third-round meeting with Feliciano Lopez.

Three-time grand slam champion Wawrinka understands how Medvedev can feed off negative energy, saying: "For sure I understand how you can get from any atmosphere. That's why you play.

"I understand the enjoyment of that, not only in positive but also in negative. You always look for something, and that's going to be interesting."

Novak Djokovic revealed he had been in constant pain for weeks after he retired from his US Open fourth-round match with Stan Wawrinka due to a shoulder injury.

Djokovic received massages on his shoulder at several junctures during his second-round meeting with Juan Ignacio Londero at Flushing Meadows.

However, the world number one appeared in much-improved condition in a third-round win over Denis Kudla on Friday, only for the issue to resurface as Wawrinka dictated Sunday's last-16 clash.

Wawrinka claimed the first two sets 6-4 7-5, with Djokovic receiving treatment prior to the third before conceding defeat following a double-fault that gave the Swiss another break of serve for a 2-1 lead.

After his title defence came to an end, Djokovic told a media conference: "The pain was constant for weeks now. Some days higher; some days with less intensity and obviously taking different stuff to kill the pain instantly. Sometimes it works; sometimes it doesn't.

"[It's] very frustrating. Obviously not the first, not the last player to get injured and to, you know, withdraw from one of the biggest events in sport.

"But obviously I just came off the court, so of course it hurts."

Djokovic was booed off by large sections of the Arthur Ashe Stadium crowd upon leaving the court but refused to blame them for doing so.

"Look, I'm not being offended by, you know, [being] mistreated by anybody," he added. "I don't really pay too much attention on that.

"I like to respect others. I hope that others can respect me and my decision.

"I'm sorry for the crowd. Obviously they came to see a full match, and just wasn't to be. That's all it is.

"A lot of people didn't know what's happening, so you cannot blame them. It is what it is."

Novak Djokovic bowed out of the US Open against Stan Wawrinka, while Roger Federer cruised into the quarter-finals on Sunday.

Wawrinka looked in fine form and was two-sets-to-love up when Djokovic, who has been dealing with a shoulder injury, retired on Arthur Ashe Stadium.

The world number one and defending champion's exit has opened up the top half of the draw, although Federer is starting to find some better form in New York.

 

DJOKOVIC DEPARTS AMID SHOULDER STRUGGLES

Wawrinka was leading Djokovic 6-4 7-5 2-1 when the Serbian retired, having earlier again received treatment on his left shoulder.

In a rematch of the 2016 final, Wawrinka – then the champion in four sets – looked in good form as he took control of the fourth-round clash.

The Swiss three-time grand slam champion has struggled with injuries in recent years, but seems to be getting close to his best form again.

The quarter-finals at Flushing Meadows add to his run to the last eight at the French Open.

 

FEDERER IN A RUSH

Federer, the five-time champion, needed just 79 minutes to thrash Belgian 15th seed David Goffin 6-2 6-2 6-0.

The 20-time major champion mixed 35 winners with 17 unforced errors in a ruthless victory.

Federer dropped the opening set in the first two rounds, but has now lost just nine games in his past two wins.

MEDVEDEV RUN CONTINUES, DIMITROV RESURGENT

Next up for Wawrinka is Daniil Medvedev, who continued his run with a 3-6 6-3 6-2 7-6 (7-2) win over qualifier Dominik Koepfer.

No player has more wins than the Russian on the ATP Tour this year and Medvedev is still embracing his villain status with the crowd in New York.

His win saw him move into the quarter-finals at a grand slam for the first time, with a tough clash against Wawrinka awaiting him.

Grigor Dimitrov moved into his first US Open quarter-final by beating Alex de Minaur 7-5 6-3 6-4.

The Bulgarian has reached the last eight at majors four times previously, but his clash against Federer will be his first grand slam quarter-final since the 2018 Australian Open.

Novak Djokovic is out of the US Open after retiring from his fourth-round match with Stan Wawrinka.

The Serbian battled a shoulder injury in his second-round win over Juan Ignacio Londero but appeared to suggest his condition had improved after a third-round defeat of Denis Kudla.

However, the world number one was second best throughout against the 2016 champion and called it quits after he dropped his serve to give Wawrinka a 6-4 7-5 2-1 lead in the third.

Wawrinka, who is in pursuit of his fourth major title, will play Daniil Medvedev for a place in the semi-finals.

Competing at the scene of her traumatic maiden grand slam triumph in front of a crowd predictably and passionately backing a star American opponent, it would have been easy for Naomi Osaka to crumble in the third round of the US Open.

The defending champion and world number one had all the pressure on her shoulders in Saturday's blockbuster clash with 15-year-old Coco Gauff, who comparatively had nothing to lose after again capturing the sporting world's imagination with two thrilling wins.

Rather than wilting at the venue where she had been left in tears 12 months ago, Osaka rose to the occasion in stunning style, delivering a show of class on and off the court that should secure her place as a favourite in the hearts and minds of fans, as well as a frontrunner for the title.

From the start, Osaka played with confidence and ruthlessness, racing into a 3-0 lead. Rather than being overawed by the stage, she rose to it with the enthusiasm of a player with two major titles to her name.

Gauff threatened a comeback as the teenager found her footing, but she was never able to locate the consistency needed to restore parity against a player operating at Osaka's level.

After clinching the opening set, Osaka was relentless, refusing to let up as she condemned Gauff to a bagel in the second.

Osaka got 91 per cent of returns in play, converted six of her seven break points and hit 24 winners to Gauff's eight.

Pirouetting as she won one point to set up a break chance, Osaka operated with more freedom as Gauff faded and the gulf in experience and quality became more telling.

Yet nothing Osaka produced on the court could top what she did after the match, as she persuaded a tearful Gauff into staying behind to be interviewed alongside her in front of the packed crowd.

Both players ended up reduced to tears, but those shed will be remembered as part of one of the indelible moments of US Open history. A marked contrast to those Osaka wept last year as Serena Williams' row with umpire Carlos Ramos overshadowed what should have been the greatest night of the Japanese's career.

Gauff could not have been more appreciative of the gesture, and summed up Osaka's evening on and off the court perfectly.

"For me the definition of an athlete is someone who on the court treats you like your worst enemy but off the court can be your best friend," Gauff said. "I think that's what she did."

Discussion over Osaka's slightly withdrawn nature and lack of comfort in the spotlight has been a prominent feature of her rise to the top of the women's game.

Now the focus has been shifted to her capacity for empathy and her sportsmanship, though Osaka appeared to indicate she would still rather not be the subject of such attention.

Asked if the tennis world needs more "Naomi moments", Osaka replied: "I don't know what a Naomi moment is. Hopefully there won't be many of those. Yeah, whatever I do, I try to tell myself to just do it from the heart."

If she maintains the kind of form she demonstrated on Saturday, there is a strong chance the next Naomi moment will be her lifting the trophy.

Following her wonderful display of compassion for Gauff, the New York crowd that booed as she collected the trophy last year will surely this time be on her side should she prevail again.

Mike Bryan received a $10,000 fine from the US Open for mimicking pointing a gun at a line judge during a doubles match on Saturday.

Playing with his brother Bob Bryan, Mike Bryan received a code violation for unsportsmanlike conduct from chair umpire Mariana Alves during the second set of their match with Federico Delbonis and Roberto Carballes Baena.

The US Open subsequently assessed Mike Bryan the fine, which is the largest given to a male player at this year's grand slam, with the 41-year-old conceding his gesture could be deemed particularly inappropriate given the recent spate of shootings in the United States.

In a statement reported by the New York Times, Mike Bryan said: "I apologise for any offense I may have caused. We won the point and the gesture was meant to be playful.

"But given the recent news and political climate I understand how my gesture could be viewed as insensitive. I promise that I will never do anything like this again."

The Bryan brothers won the match in straight sets. Mike Bryan has claimed 18 grand slam doubles titles, 16 of those coming alongside Bob.

Serena Williams suffered an injury scare as she progressed to the last eight of the US Open with a straight-sets win over Petra Martic.

Though she was broken early in the match, Williams never really looked troubled by Martic as she won her 99th match at the US Open.

That tally is her most at a grand slam, but the 23-time major winner's triumph was not without drama as she rolled her ankle in the second set when going to the net.

Williams had to take a medical timeout but said she felt "good" afterwards, and her spirits will likely have been boosted by the exits of Ashleigh Barty and Karolina Pliskova.

BARTY PUTS IT IN PERSPECTIVE

Barty was stunned by Wang Qiang in her fourth-round clash, the second seed making 39 unforced errors in a highly disappointing display.

Wang claimed a 6-2 6-4 win, denying Barty the chance to play Williams in the quarter-finals, but the French Open champion was able to look back on her grand slam season with satisfaction.

"We've had a great season in grand slams for singles. We've made the second week every single one, which has been really special," Barty told a media conference.

"Now we'll sit back, reflect, and look forward to a big couple months to finish off the year."

DOUBLE CELEBRATION FOR SVITOLINA

Elina Svitolina, meanwhile, saw off American Madison Keys in straight sets.

Svitolina is in a relationship with Gael Monfils, who watched on in Arthur Ashe Stadium.

Monfils turned 33 on Sunday, and Svitolina revealed she was inspired by playing on his birthday.

"It's his birthday, I was trying to be really focused on my match but it was extra motivation for me," Svitolina told ESPN on court afterwards.

 

LAST EIGHT IS GREAT FOR KONTA

Johanna Konta outlasted third seed Pliskova in an engrossing match on Louis Armstrong, producing a fine comeback to prevail 6-7 (1-7) 6-3 7-5.

It means the Briton has now reached the last eight of every slam in her career.

Konta is also the first British woman to reach this stage at the US Open since Jo Durie in 1983.

"I'm really pleased [with that achievement]," Konta said at a media conference. 

"I think for me more on a personal level to be able to have made it to the quarters for my third slam in a row, I think that's a really, really big achievement for me. So I'm really pleased with that."

Serena Williams and her coach Patrick Mouratoglou moved to allay fears over her right ankle after she turned it during her US Open win over Petra Martic.

Williams moved into the last eight, where she will face Wang Qiang, with a 6-3 6-4 defeat of the 22nd seed at Arthur Ashe Stadium.

Though she won in relatively comfortable fashion, there was significant concern in the second set as Williams called for the trainer after rolling her ankle when going to the net for a volley. 

Asked how she felt in a post-match media conference, Williams replied: "Ankle, I usually know if it's horrible early on. I mean, I had a really bad ankle sprain in January.

"I was like, instantly, 'No, this can't happen. I'm finally healthy'.

"But I'll see tomorrow. So far I'm good. I have been managing it. We'll see tomorrow [Monday]."

Mouratoglou echoed Williams' assessment of the injury, though he also indicated they will have to wait to have a full understanding of her condition.

He said: "There is the video, but what is more important is how she feels and how the ankle looks.

"The ankle looks okay. She doesn't feel much pain. It's acceptable. And we will know tomorrow when it's going to be cold."

Williams did not call for the trainer when she injured her ankle in the final set of her Australian Open loss to Karolina Pliskova and was quizzed on whether that influenced a more cautious approach this time around.

"I definitely wanted to have a better plan. I probably should have seen a trainer in Australia," she added.

"I definitely thought about that, because I was, like I said, the first thing was I'm finally healthy. The last thing I want is to have another bad ankle sprain.

"So I just wanted to get some compression on it and tape it even stronger and that way I can at least try to finish the match."

Serena Williams suffered a worrying injury scare as she overcame Petra Martic to reach the quarter-finals of the US Open for the 16th time.

Last year's runner-up in the women's singles, who has endured a number of fitness issues in 2019, rolled her right ankle in the second set inside Arthur Ashe Stadium on Sunday.

The painful-looking incident did not prevent Williams from winning the next two points to break serve, and she duly completed a 6-3 6-4 victory after undergoing treatment during a medical timeout.

However, it remains to be seen whether the six-time US Open champion will be fully fit for her last-eight match against Wang Qiang on Tuesday, when she will seek to record a 100th match win at Flushing Meadows.

Martic, the 22nd seed, showcased plenty of imagination and shot-making ability on a rare show-court outing, but the underdog understandably struggled to handle her opponent's power and appeared to lose her focus after Williams' slip at the net.

Williams, who turns 38 later this month and first won the title at Flushing Meadows 20 years ago, certainly did not have things all her own way in the opening set.

However, after being broken from 40-0 up in the opening game, the veteran gradually seized control, her relentlessly aggressive approach reaping rewards.

Having moved 5-3 up when Martic stumbled on the baseline, a fired-up Williams had to save two break points before she took a leaf out of the Croatian's book with a drop-shot winner that sealed the set.

At that point, things looked routine for the eighth seed, but her subsequent fall sparked a dramatic change of atmosphere inside Ashe, with Williams immediately looking downcast as she got back to her feat.

"It affected me a little mentally," said the home favourite in her on-court interview. Nevertheless, she won the next two points to break and looked to be moving well as she wrapped up victory after heavy strapping was applied to her right foot.

Williams, whose win came two years to the day after the birth of her daughter, will now hope the slip leaves no lasting impact as she continues her latest bid to equal Margaret Court's record of 24 grand slam singles titles.

STATISTICAL BREAKDOWN
Serena Williams [8] bt Petra Martic [22] 6-3 6-4

WINNERS/UNFORCED ERRORS
Williams - 38/19
Martic - 11/12

ACES/DOUBLE FAULTS
Williams - 4/3
Martic - 2/1

BREAK POINTS WON
Williams - 3/8
Martic - 1/3

FIRST SERVE PERCENTAGE
Williams - 63
Martic - 62

PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Williams - 79/55
Martic - 60/46

TOTAL POINTS
Williams - 73
Martic - 56

Roger Federer's quest to reach a first US Open final since 2015 continued at pace as he dismantled David Goffin in straight sets at Flushing Meadows.

Federer has breezed through the draw in New York and, despite going down an early break at Arthur Ashe Stadium, was able to enjoy another comfortable early afternoon triumph.

The 20-time grand slam champion needed only an hour and 19 minutes to complete a 6-2 6-2 6-0 triumph in imperious fashion

Having easily avoided falling at the same stage he did last year, Federer will now face either Grigor Dimitrov or Alex de Minaur for a place in the semi-finals.

Goffin produced early signs of a potential shock when he put Federer under pressure in the third game and the Swiss netted a backhand to surrender a break.

However, Federer swiftly responded in kind and then broke to love for a 4-2 lead before going on to take the first set in just 27 minutes.

Belgian Goffin pulled a backhand wide to give Federer the break and a 3-1 advantage in the second. However, Federer went down 0-40 on serve in the subsequent game and handed the break back with a double fault.

Yet a poor volley followed by a poor backhand from Goffin saw Federer take the initiative once more, and there were to be no further slip-ups from the 38-year-old as he raced to victory.

Goffin's third-set surrender was meek as Federer shifted through the gears, brilliantly dictating proceedings and pulling a tiring world number 15 from pillar to the post.

Federer wrapped things up in trademark style with stylish backhand down the line to delight the crowd and send him into the last eight.

 

STATISTICAL BREAKDOWN
Roger Federer [3] bt David Goffin 6-2 6-2 6-0

WINNERS/UNFORCED ERRORS
Federer – 35/17
Goffin – 8/17

ACES/DOUBLE FAULTS
Federer – 10/3
Goffin – 0/4

BREAK POINTS WON
Federer – 9/10
Goffin – 2/7

FIRST SERVE PERCENTAGE
Federer – 68
Goffin – 50

PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Federer – 83/40
Goffin – 40/27

TOTAL POINTS
Federer – 83
Goffin - 39

Ashleigh Barty crashed out of the US Open in the fourth round as she suffered a straight-sets defeat to Wang Qiang at Flushing Meadows.

French Open champion Barty had the chance to set up a mouth-watering quarter-final clash against Serena Williams with victory at Louis Armstrong Stadium.

However, the second seed was well below her best in a 6-2 6-4 defeat marked by 39 unforced errors.

Wang, meanwhile, displayed impressive character in reaching her first grand slam quarter-final.

She saved four break points in a 10-minute game to hold for 5-3 in the second set and was required to hold off two more as she successfully served out the win in an hour and 22 minutes.

"I'm very focused on court, I just tried to hit aggressive," 18th seed Wang told ESPN on court afterwards.

Asked if she would be doing her homework by watching Williams' clash with Petra Martic, Wang said: "I think that's my coach's homework. I just want to enjoy now."

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