Leylah Fernandez carried on her brilliant form to clinch a place in the semi-finals of the US Open with a 6-3 3-6 7-6 (7-5) victory over Elina Svitolina.

The newly turned 19-year-old has put her name into the history books with a wonderful run at Flushing Meadows, dethroning the defending champion Naomi Osaka and three-time grand slam winner Angelique Kerber on her way to the quarter-finals.

Fernandez's streak will not stop there, and she will now play for a place in the final after overcoming world number five Svitolina in a tense tussle at Arthur Ashe Stadium.

Svitolina was the first to blink as Fernandez broke to nose ahead in the first set, which she took in 40 minutes.

Yet the 2019 US Open semi-finalist struck back in set two, saving three break points to serve out the set.

The Canadian made a brilliant start to the decider, only to concede serve immediately after nudging herself into the lead.

Fernandez rallied herself to break again and Svitolina looked beaten, with the youngster on the verge of the semi-final at 5-2 up.

Once again, however, Svitolina found some resolve, reeling off three consecutive games and forcing a tie-break.

Despite Svitolina seemingly finding a second wind, it was Fernandez who raced into a 4-1 lead, only to once more be pegged back.

Svitolina found another ace to make it 5-5, but a passing shot from Fernandez clipped the net to evade the Ukrainian, who then sent a return long – to the jubilation of the crowd – that sealed a stunning triumph for Fernandez, who collapsed to the court in tears.

Data Slam: New ground for another teenage sensation

Fernandez turned 19 on Monday and celebrated in incredible style a day later. It is her first grand slam semi-final, as she hunts what would just be a third Tour final overall (and a second title after her Monterrey success this year). She will need to cut down on her unforced errors (31), and she only hit one ace compared to Svitolina's eight, but in what was just her second third-set tie-break, Fernandez showed maturity well beyond her years. Next up, it is Aryna Sabalenka or French Open champion Barbora Krejcikova.

WINNERS/UNFORCED ERRORS

Svitolina – 32/25
Fernandez – 42/31

ACES/DOUBLE FAULTS

Svitolina – 8/3
Fernandez – 1/5

BREAK POINTS WON

Svitolina – 4/6
Fernandez – 4/10

Daniil Medvedev took the first spot in the men's semi-finals at the US Open as he beat qualifier Botic van de Zandschulp in four sets on Tuesday.

Second seed Medvedev was two sets up with just over an hour played at Arthur Ashe Stadium, yet was ultimately made to work for a 6-3 6-0 4-6 7-5 triumph.

The Russian, a beaten finalist at Flushing Meadows in 2019 and a semi-finalist last year, broke Van de Zandschulp three times in the opening set, which he took at the fourth time of asking as his Dutch opponent offered up the first sign it would not be an easy day for the favourite.

Medvedev wrapped up a second set bagel with ease, though Van de Zandschulp – who beat in-form world number 11 Casper Ruud en route to the quarters – found some resolve in the third.

Unforced errors from the world number two handed Van de Zandschulp hope and the 25-year-old stuck 91 per cent of his first-serve points to take advantage.

Medvedev's wobble was short lived, however, with his composure regaining as he held his serve in what proved to be the final set.

A match point went begging as Medvedev missed the chance to break, but victory was assured on Van de Zandschulp's next serve, with a drop shot nestling into the net.

Next up for Medvedev is Felix Auger-Aliassime or Carlos Alcaraz, with the latter the youngest men's quarter-finalist at the US Open in the Open Era.

Data Slam: Medvedev's serve too strong

Medvedev won a whopping 83 per cent of his first serve points, converting 54 of 65, and finished with 13 aces. "I'm really happy with my serve in the fourth set, and to get through without a tie-break," he said. Indeed, in the final set, the 25-year-old's first serve percentage was up at 85. 

WINNERS/UNFORCED ERRORS

Van de Zandschulp – 36/35
Medvedev – 36/24

ACES/DOUBLE FAULTS

Van de Zandschulp – 4/4
Medvedev – 13/1

BREAK POINTS WON

Van de Zandschulp – 2/5
Medvedev – 7/12

Maria Sakkari felt she got her just rewards for being brave as she triumphed in a late-night US Open thriller against Bianca Andreescu.

The Greek sealed a 6-7 (2-7) 7-6 (8-6) 6-3 victory in a gruelling last-16 clash that finally concluded at 02:13 local time in New York – the latest finish to a women's singles match in tournament history.

Sakkari saved eight of the 12 break points she faced as she racked up 46 winners and 40 unforced errors after adopting a bold approach to fight back from a set down and wrap up the victory in three hours and 30 minutes.

She ended 2019 champion Andreescu's 10-match unbeaten streak at the US Open and was delighted to see her tactics pay off, with Karolina Pliskova standing between her and second grand slam semi-final of the year.

Speaking about her fearless showing, Sakkari, who was beaten in the last four at Roland Garros, said: "It's something that I've been working with [coach] Tom [Hill] since end of last year, but I felt like I lost that bravery after the French. I was more hesitant. I was not going for it so much.

"After my loss [in Cincinnati] with Angie [Angelique Kerber] I just practiced for two weeks. I had some very tough practices where I was crying because I could not feel my shots, I could not feel my tennis. But thankfully I had Tom and Yannis, my hitting partner, that supported me a lot.

"I lost my identity. That's how I called it. I lost myself, part of myself. With my psychologist, as well, I found a way to come back and feel again what I felt out there today.

"By telling myself to be more brave, it's not like, Maria, now be brave, and you're brave. It's just a process in practice and everything that has helped me to be more brave.

"I mean, there was a decent crowd staying until 2:30 at night. I said, Maria, you cannot give up. Just stay focused and stay calm and just make balls."

Jenson Brooksby has confidence he can compete with anybody after threatening a fourth-round upset against Novak Djokovic at the US Open.

The unheralded American posed a real problem for Djokovic at Arthur Ashe Stadium and took out the opening set 6-1 in New York City.

It was not to be, though, as Djokovic – chasing a calendar Grand Slam – roared back to win 1-6 6-3 6-2 6-2.

Despite falling short, Brooksby is only looking at the positives from going toe-to-toe with the world number one in such a huge match.

"It's definitely all positive things to take away. I learned my game. I'm feeling really confident in my game. I believe I can compete with anybody," Brooksby said after his first run to the second week of a grand slam.

"I knew it would be important to start strong, to impose my mindset and my strategy, my game out there. It's definitely special. I mean, I always enjoy the matches and everything throughout the moment. Obviously you have to stay focused.

"Afterwards, you can always have time to reflect more. Just appreciate and enjoy for the whole journey.

"Atmospheres like that are what you want to be in front of since you were a little kid, watching on TV when you were young, and now you're living it. It is something I really appreciate and I'm grateful to be here now. I'm excited to keep [playing] in atmospheres like this for the future."

Brooksby required treatment a couple of times during the match and revealed he was contending with an issue to his left hip.

"Yeah, there was something. Something that kind of came up from later in the second match, then in the third one. Even with a day off, then kind of into today, like my left hip kind of was bothering me even early on and more into it," he added.

"Not like it's an excuse or anything, but it kind of went throughout the leg today a bit. I was struggling more to push off and move. But that's part of the sport. I did everything I could to feel the best I can going out there today and all the other days. There's no regrets on that.

"I definitely think if there wasn't that, I could have kept a better level up closer to the first set throughout the rest of the match."

Brooksby only reached the world's top 100 earlier this month and is now projected to be on the cusp of the top 40.

The 20-year-old relished his first experience of playing on Arthur Ashe.

"I did take time to look around a little bit, just appreciated being in an atmosphere like that with so many people cheering you on. Took a moment to still have it all in after," he said. 

"You're not going to win every match you play obviously, but you still have to enjoy it.

"I think [the belief] comes from definitely more training, but most importantly other match situations against other guys and just the whole process of it. 

"Leading up to it, I 100 per cent believed I could win against anybody. I thought I showed that with the level I could produce out there. Unfortunately, physically it got a little tougher."

Novak Djokovic said "I'll take your legs out, that's for sure" after digging deep to outlast American qualifier Jenson Brooksby in a physically demanding encounter at the US Open.

Djokovic – bidding to become only the third man to claim a calendar Grand Slam and first since Rod Laver in 1969 – rallied from a set down to prevail 1-6 6-3 6-2 6-2 en route to the quarter-finals in New York on Monday.

It was a brutal clash on Arthur Ashe Stadium, 20-time major champion and top seed Djokovic needed almost three hours to see off world number 99 Brooksby, who was making his debut at the iconic venue.

After being blitzed in a 29-minute opening set, Djokovic and Brooksby contested a gruelling 20-minute fifth game in the second set – the latter converting a sixth break-point chance.

Djokovic's physical superiority, however, was on display as the Serb star eventually powered past the spirited 20-year-old at Flushing Meadows.

During the last-16 matchup, former world number one Andy Roddick tweeted, in reference to Djokovic, "first he takes your legs… then he takes your soul".

Djokovic – who will face sixth seed Matteo Berrettini in a repeat of the Wimbledon final – said on court: "Thanks Andy, I take that as a compliment – only the first part.

"The second part, I don't take anybody's soul. Everyone has their soul, we're all beautiful souls so I appreciate everyone. But I'll take your legs out, that's for sure."

Djokovic hit 44 winners in the four-set triumph, to go with 41 unforced errors in a tricky clash under the Arthur Ashe lights.

With his hard-fought victory, Djokovic improved to 11-0 against Americans at the US Open. He is 29-3 at major events and 70-10 in ATP Tour-level matches.

The 34-year-old is on a 21-match winning streak against players from the United States since Sam Querrey snapped his 30-match slam streak at Wimbledon in 2016.

"Great quality match," Djokovic, who can break the record for most men's slam titles – currently level with injured pair Rafael Nadal and Roger Federer, told reporters. "He started off better. I've never played him. I didn't see him play too many times. Maybe few matches in the last few months. Haven't followed his career prior to that, so I didn't know much about him. Had to do some homework and some analysis.

"It's different stepping out on the court first time against someone that really has nothing to lose. He's a young, talented player that is very crafty. He's got the really all-around game. He was pumped. He had the crowd behind him, of course. He played a perfect first set. Everything he intended to do he executed it perfectly.

"On my end, I was just trying to find a rhythm, trying to read his game, trying to understand where I can find holes in his game and start to attack and shift the momentum to my side.

"That happened already at the beginning of the second set. I broke him early. He broke back. But I re-broke his serve right away. We had some very, very long rallies, long games. It took a toll physically I think on both of us at that point. But I managed to find the right serves. I served efficiently when I needed to, opening up the court.

"The third and fourth set were really, really good from my side. I felt I was more dominant. I decreased the unforced errors that were really high in the first part of the match. I just was kind of swinging through the ball better. Was a good finish. It wasn't a good start. But all in all, expected the battle, and I got that one. I'm pleased to overcome it."

World number one Novak Djokovic's quest for a calendar Grand Slam and record-breaking 21st major title remains on track after outlasting Jenson Brooksby 1-6 6-3 6-2 6-2 in a gruelling US Open showdown.

Unheralded American qualifier and world number 99 Brooksby had the crowd roaring following an incredible opening set against Djokovic in Monday's last-16 clash at Flushing Meadows.

However, Djokovic – bidding to become only the third man to sweep all four slams in the same year and first since Rod Laver in 1969 – responded to the almighty challenge, showcasing his superior physicality as the three-time US Open champion rallied into the quarter-finals in New York.

Brooksby was making his first appearance on Arthur Ashe Stadium, where the 20-year-old was looking to become the lowest-ranked player to beat a number one at the US Open since the start of the ATP rankings in 1973 and youngest American man since Andy Roddick (2003 Wimbledon) to reach a major quarter-final.

He was not overawed on the big stage, blitzing Djokovic in a remarkable first set. Playing with a bounce in his step and bringing the crowd to its feet, Brooksby only hit one unforced error in a dominant 29-minute display, which included two breaks of serve.

Djokovic was 38-34 at grand slams when losing the opening set and 12-10 at Flushing Meadows and after an error-filled opener, the Serb star let out an almighty roar after racing out to a 3-0 lead.

Just as Djokovic – level on 20 men's slams with Rafael Nadal and Roger Federer – looked comfortable, he endured a marathon 20-minute fifth game against Brooksby.

Brooksby broke at the sixth time of asking and the breath-taking tennis continued as Djokovic broke straight back to reclaim his advantage at 4-2 – the latter ending the game with an intense stare down in the direction of his opponent.

After a gruelling second set to level the match, the third followed a similar pattern, with Djokovic breaking in the opening game before moving 3-0 ahead.

Djokovic did not relinquish that lead, hitting 13 winners while claiming 11 of his 13 points at the net as he took the match to Brooksby.

Brooksby put up a huge fight but, he was unable to maintain his charge as the crowd went silent – Djokovic looking ahead to a last-eight showdown with sixth seed Matteo Berrettini in a rematch of the Wimbledon final.

Data slam: Djokovic flawless against locals in New York

With his hard-fought victory, which lasted almost three hours, Djokovic improved to 11-0 against Americans at the US Open. He is 29-3 at major events and 70-10 in ATP Tour-level matches. The 34-year-old is on a 21-match winning streak against players from the United States since Sam Querrey snapped his 30-match slam streak at Wimbledon in 2016.

WINNERS/UNFORCED ERRORS

Djokovic – 44/41
Brooksby – 27/28

ACES/DOUBLE FAULTS

Djokovic – 9/1
Brooksby – 4/1

BREAK POINTS WON

Djokovic – 6/12
Brooksby – 3/11

Shelby Rogers was anticipating "nine million death threats" after her fourth-round loss to Emma Raducanu at the US Open on Monday. 

Just two days after coming from two breaks down in the third set to defeat world number one and top seed Ash Barty, Rogers succumbed to a 6-2 6-1 defeat at the hands of Raducanu.

The 18-year-old consequently reached the first grand slam quarter-final of her career and became just the third qualifier to reach the last eight of the women's draw at Flushing Meadows in the Open Era.

Having been overwhelmed with adulation in the wake of her win against Barty, Rogers admitted she was now concerned the scales would tip the other way. 

Sloane Stephens revealed she received more than 2,000 abusive messages on social media after losing to Angelique Kerber in the third round and her fellow American was wary of suffering a similar fate. 

"I kind of wish social media didn't exist, but here we are. It's a big part of marketing now. We have contracts, we have to post certain things," said Rogers. 

"You could probably go through my profile right now, I'm probably a fat pig and words that I can't say right now. But, I mean, it is what it is. You try not to take it to heart, and it's the unfortunate side of any sport and what we do." 

She continued: "I think someone asked by the other day some advice I would give, and I said try not to get too high or too low with every match. 

"It's tough when you know you have a win like that [against Barty] and everybody is treating it like the final. Everybody coming up to me on-site. 

"I'm really actually happy I had doubles [on Sunday] because it kind of refocused me a little bit, but everyone's coming up to you, 'Oh, great win.' I'm like, 'Yeah, but it's just the third round. We're not even halfway right now.' 

"It's just really tough sometimes to keep that in perspective, but you do the best you can and try to ignore the media and everybody blowing it up and making you the story of the tournament. 

"Obviously, we appreciate the spotlight in those moments, but then you have today and I'm going to have nine million death threats and whatnot. It's very much polarising – one extreme to the other very quickly. 

"At this point in my career, I'd say I'm used to it. It's just now for me, finding a way to have those big wins but then be able to back it up a little bit. It's not easy to say the least." 

Rogers won just 38 per cent of points behind her first serve and committed a total of 29 unforced errors, leaving the 28-year-old hugely dissatisfied with her display. 

"That was pretty embarrassing," she said. "It was a tough day at the office. Unfortunately, I had to fail in front of thousands and thousands of people. I have to live with that one. 

"It's disappointing that I couldn't must up a little more today. But I told you guys the other night it took everything I had to beat Barty. I guess that was a little apparent today. The tank was empty."

Emma Raducanu broke new ground on Monday as the qualifier reached the quarter-finals of the US Open in supreme style.

The 18-year-old produced one of the performances of the tournament when she defeated Sara Sorribes Tormo 6-0 6-1 on Saturday.

The Briton lost the first two games of her clash with Shelby Rogers, who impressively beat world number one Ash Barty in the previous round, but she then stormed to a 6-2 6-1 victory in her first outing on the court of Arthur Ashe Stadium.

Raducanu, who made headlines in the United Kingdom when she reached round four on her Wimbledon debut in July, will now face Olympic gold medallist Belinda Bencic in the first major quarter-final of her career.

Raducanu responded after a nervy start by reeling off six games in a row to take the first set in dominant fashion.

Rogers, who won just 12 points behind her first serve throughout, seemed to wilt against the onslaught as her groundstrokes became wild, her unforced error count totalling 29 by the end.

Raducanu appeared to feel the nerves towards the end of the second set but eventually closed out a famous win on her fourth match point, becoming just the third qualifier in the Open Era to reach this stage of the US Open.

"It feels absolutely amazing to play in front of all of you," she said in her on-court interview. "I'm so happy to have come through and overcome some of the nerves from the beginning.

"Belinda's a great player who's in great form, so I know I'm going to have to bring it.

"I'm just not really thinking about tennis right now. I'll leave that for tomorrow!"

Raducanu will face Bencic on Wednesday, the Swiss having beaten seventh seed Iga Swiatek in straight sets.

Carlos Alcaraz's fairytale run to the quarter-finals at the US Open is a dream come true for the Spanish teenager.

Alcaraz became the youngest men's US Open quarter-finalist in the Open Era when he ousted Peter Gojowczyk 5-7 6-1 5-7 6-2 6-0 on Sunday.

The 18-year-old, who became the youngest man to defeat a top-three player at Flushing Meadows when he beat Stefanos Tsitsipas last week, is also the most junior male player at the New York grand slam since Thomaz Koch in 1963.

Similarly, Sunday's triumph made him the youngest men's singles quarter-finalist at any grand slam since Michael Chang (18) made the last eight at the 1990 French Open.

Alcaraz will now face another rising star – Felix Auger-Aliassime – for a place in the semi-finals.

"I'm super excited to be in my first second week in the grand slam, so it's amazing for me. It's a dream come true," an ecstatic Alcaraz told reporters.

"It's really tough to play these kinds of matches, to play fifth sets. I hope to play [in] more second weeks, to play more quarter-finals of grand slams.

"I didn't expect to play in the quarter-finals here, so I think it's a really good performance from me in these matches."

Dubbed as the heir to Rafael Nadal's thrown, Alcaraz has certainly had the crowd on his side during his run.

"In the first sets I thought that I reached my limit, physically and mentally. I think the crowd was really, really important for me in this situation," Alcaraz added.

"I felt the energy of the crowd pushing me up. I think without the crowd, it couldn't be possible to be here."

Alcaraz faces a stern test in the form of world number 15 Auger-Aliassime, who has reached his second straight grand slam quarter-final.

However, the 21-year-old Canadian – who is aiming to secure a maiden appearance in the last four of a major – knows the quality Alcaraz possesses.

"He's a great player. At some point age is just a number. He already feels like a player who's established," Auger-Aliassime said of Alcaraz.

"He's playing some amazing tennis, so I think we’ll see a lot of him, a lot of us, a lot of Frances [Tiafoe] in the future."

Barbora Krejcikova explained she was hit by breathing difficulties and a spell of severe dizziness as she overcame Garbine Muguruza at the US Open.

French Open champion Krejcikova – who is making her main-draw debut at Flushing Meadows – had to hold off a fightback from former world number one Muguruza on Sunday to progress into her first US Open quarter-final with a 6-3 7-6 (7-4) victory.

However, Muguruza was left angry after Krejcikova started to take more time in between points.

After saving three set points at 4-5 down in the decider, Krejcikova went off court for medical treatment, before returning to see out the match on a tie-break.

Muguruza appeared to confront Krejcikova during the post-match handshake, and the Spaniard told the media: "I'll let you guys judge what you think about this.

"I think, between players, you know a little bit how to behave in certain moments and I wasn't very happy at the end of the match."

Krejcikova, however, explained how she had suffered during the match.

"I think I started the match really well and was playing good tennis," Krejcikova said, according to the WTA. 

"The key was to start the match well. There were a lot of breaks, which was difficult, but I was happy that I won the first set 6-3. Out of nowhere I got the lead 4-0 and then things started to get complicated.

"Garbine started to raise her level and I was expecting that. At the end I was really struggling and I feel really bad right now.

"I don't really know what happened, but I couldn't breathe. I started to feel dizzy and the whole world was shaking. It never happened to me before."

Krejcikova also needed medical attention after the match and did not hold a post-match news conference.

The Czech has now won 29 of her last 32 matches and will face Aryna Sabalenka, the highest seed remaining at Flushing Meadows, in the quarter-finals. 

Teenage Spanish sensation Carlos Alcaraz made history after outlasting Peter Gojowczyk for a US Open quarter-final berth.

Alcaraz became the youngest men's US Open quarter-finalist in the Open Era thanks to Sunday's 5-7 6-1 5-7 6-2 6-0 victory at Flushing Meadows.

After stunning third seed Stefanos Tsitsipas in New York, where he became the youngest man to defeat a top-three player at the US Open, the 18-year-old needed another five-setter to continue his fairytale run.

Alcaraz rallied past Gojowczyk, finishing with 35 winners – five more than the German qualifier – and 45 unforced errors, which were 39 fewer than his opponent.

Dubbed the new Rafael Nadal, Alcaraz became the youngest men's US Open quarter-finalist since Thomaz Koch (18) in the pre-Open Era in 1963.

He also became the youngest men's grand slam singles quarter-finalist since Michael Chang (18) at the 1990 French Open.

With the win, Alcaraz became the youngest men's player to earn back-to-back five-set wins at a grand slam since Chang (16) at the 1988 US Open as Felix Auger-Aliassime or Frances Tiafoe await.

Canadian sensation Leylah Fernandez said she is pinching herself after continuing her fairytale run with a shock last-16 win over Angelique Kerber at the US Open.

After stunning defending champion Naomi Osaka in a third-round boilover at Flushing Meadows, giant-slaying teenager Fernandez conquered three-time grand slam winner Kerber 4-6 7-6 (7-5) 6-2 en route to the quarter-finals.

Kerber – the 2018 US Open champion – won the opening set in New York, however 18-year-old Fernandez staged a remarkable comeback on the eve of her 19th birthday to reach her first slam quarter-final.

"I did have to pinch myself a little bit to see that it actually happened, but like I said, I knew that my tennis, my level of tennis is there," Fernandez said post-match. "It's just a moment of time, opportunity, and I'm glad that I was able to get this opportunity now and that I was able to showcase what I can do in front of these players.

"Even if I would have lost, I would have been proud of myself with the way that I played, the way that I fought. I was lucky enough to get the win today and just getting this experience.

"It's my first fourth-round quarterfinals in a grand slam. I'm just going to enjoy it at 100 per cent, and tomorrow is going to be a new day."

Fernandez, who hit 45 winners to 34 unforced errors – added: "The match was incredible. I was playing well in the first set.

"Unfortunately I did a few mistakes. Her, as a great player, great champion, she noticed and she took advantage of it. I was able to refocus and fight back for the second.

"In the third, I was just enjoying every moment of it. Honestly, the crowd has been amazing, so thanks to them I was able to win."

"I'm just super happy," she continued. "I'm going to enjoy tonight as much as I can, and then once I'm off to bed, I'll try to forget about it so that I can get ready for tomorrow."

Daniil Medvedev said "it's tough to beat me" as the confident and in-form world number two took another step towards his maiden grand slam crown at the US Open.

Medvedev advanced to the quarter-finals with a comfortable 6-3 6-4 6-3 victory over 24th seed Dan Evans in New York on Sunday.

US Open finalist in 2019 and Australian Open runner-up this year, Russian star Medvedev is yet to drop a set at Flushing Meadows this week.

As Dutch qualifier Botic Van De Zandschulp awaits, Medvedev discussed expectations at the US Open in pursuit of his first major title.

"I always say I take it match by match," Medvedev told reporters after hitting 42 winners in one hour, 43 minutes. "You can lose first round, you can lose final. If I play good, I know what I'm capable of. It's tough to beat me.

"In Wimbledon, I was honest, I lost against a great player, Hubert is playing great. I think he's on the rise. He's going to be even better ranked and maybe he's gonna go further in slams. He beat Roger [Federer] after me.

"But again, I was not talking about match itself where the loss was okay, I would say. I was talking about the result in general, and fourth round is not enough for number two in the world, especially I like grass more than clay, so maybe on clay I would not say this.

"Yeah, it's the same every tournament. If you're top seed, if you are not in the final, let's say Cincinnati, I lost against Rublev, brutal match, really strong play from him. But if you talk about the result itself, semi-final was not good enough.

"There is not much to add. I want to win every tournament I play in, without putting pressure on myself. Because again, I know how to win matches, and I know sometimes why I lose them, so that's just learning and being better for the next time."

Medvedev is 31-5 on hard courts in 2021 and 162-61 in his career, while he has won 11 of his 12 ATP titles on hard courts.

The 25-year-old owns a 17-4 record (80.95 per cent) at the US Open – his most wins and highest win percentage at a grand slam event.

"Feeling great before the second week," Medvedev said. "Feeling great with my tennis, my mental, my physical. Just looking forward."

Medvedev, who lost a thrilling US Open final to Rafael Nadal two years ago, added: "Now I just want to make it to the finals again to have another thing to remember and hopefully a better one."

Tokyo Olympic gold medalist Alexander Zverev refused to get carried away about his chances of winning his maiden major title despite easing into the US Open fourth round on Saturday.

The German fourth seed was leading 3-6 6-2 6-3 2-1 when Jack Sock withdrew with a groin issue which had been plaguing him throughout the match.

Zverev's walkover victory extended his winning run to 14 matches, dating back to his Tokyo 2020 gold medal triumph along with last month's Cincinnati Masters victory.

Reigning champion Dominic Thiem along with Rafael Nadal and Roger Federer all withdrew from the US Open prior to the tournament, opening the door for a first time winner.

"I’m on a 14-match winning streak now," Zverev said during his on-court interview. "I’m playing well. That’s all I want to say, I don’t want to say anything else.

"We all know that Novak is the big favourite, we all know that Daniil [Medvedev] is playing incredible tennis, we all know that there are a lot of other players out there that are playing incredible tennis.

"I think my fourth-round match against Jannik Sinner is going to be extremely entertaining because he’s a young guy that is very hungry and I feel like that’s going to be a high-level match."

Zverev also spoke about his drive to succeed at majors, having struggled earlier in his career.

The German was runner-up at last year's US Open and made the semi-finals at this year's French Open and last year's Australian Open.

Zverev's hopes for going deep at Flushing Meadows will be aided by the premature end to his match with Sock, having won in straight sets in the first two rounds over Sam Querrey and Albert Ramos Vinolas.

The Olympics gold medalist was full of praise for Sock, who has been plagued by injuries, after a dominant opening set.

"Jack I think played the best set of tennis I've ever seen him play," Zverev said. "I did one unforced error in the whole set and I lost it, 6-3, without having really any chances.

"If he would have kept it up I probably would not have won the match… Afterwards when he gets injured, it's a shame because otherwise it would have been an incredible match I think."

Novak Djokovic powered through to week two of the US Open by sinking Kei Nishikori, a player who must be sick of the sight of the Serbian.

For a 17th consecutive time in their rivalry, Djokovic beat the former world number four, who was runner-up at this tournament seven years ago.

A 6-7 (4-7) 6-3 6-3 6-2 victory in three hours and 33 minutes for Djokovic moves him into the fourth round, ever closer to the calendar Grand Slam he is chasing, having already won the Australian Open, French Open and Wimbledon.

Nishikori beat Djokovic in the US Open semi-finals in 2014, before losing to Marin Cilic in the final, but that was the last time he got the better of the man from Belgrade.

Djokovic won their 2018 semi-final at Flushing Meadows for the loss of just nine games and a 6-2 6-0 win for the world number one over Japan's Nishikori at the Tokyo Olympics in July suggested this latest clash in New York, the 20th between them, could be similarly one-sided.

Yet it became clear early in this clash that Djokovic faced a substantial test. He trailed 4-2 in the opener and could not save the set, despite forcing a tie-break. A stunning lob from Nishikori gave him two serves for the set, and he held his nerve to move in front.

Djokovic broke in the third game of the second set though and staved off a flurry of break-back points on his way to levelling the match.

When Nishikori served a double fault to allow Djokovic two break points in game four of the third set, it was inviting trouble. Djokovic won the second of those when his low slice and net rush prompted Nishikori to net a backhand.

Against the flow of the match, Nishikori broke back, helped by two consecutive double faults, but order was restored as Djokovic rolled through the next two games to move a set away from the next round.

Nishikori probably needed Djokovic's body to fail him, or for something as bizarre as last year's disqualification to occur, but nothing of the sort happened in set four, the world's best player in a class of his own.

Djokovic said: "I don't think I started off very well. I was too passive and too far back in the court and he was dictating the play. It took me a little bit of time to adjust to his game.

"By the beginning of the second set I felt like I was getting my groove back, getting my rhythm back. I was very pleased with my focus."

DATA SLAM

Nishikori will look back to the second set and ponder 'what if?', because he had seven break points and took none of them. Djokovic had three in that set and took two, and there lies greatness. Tennis comes down to taking chances as they arrive, being clinical, and after the chaos of the first set this was a ruthless Djokovic show.

WINNERS/UNFORCED ERRORS

Djokovic – 45/52
Nishikori – 38/56

ACES/DOUBLE FAULTS

Djokovic – 15/7
Nishikori – 6/3

BREAK POINTS WON

Djokovic – 7/16
Nishikori – 2/13