Rafael Nadal's happiness does not depend on finishing his career with more grand slam titles than rivals Novak Djokovic and Roger Federer.

Nadal edged out Denis Shapovalov in a five-set epic on Tuesday to reach the Australian Open semi-finals.

The Spaniard has only won the season's opening grand slam once, back in 2009. However, the field has opened up for him this year, with reigning champion Djokovic unable to compete and 40-year-old Federer taking his time to return from knee surgery.

Nadal, Djokovic and Federer are all tied on 20 grand slams each, meaning the next of the trio to win a major will set a new record.

While Nadal is hoping to go all the way in Melbourne, he insisted his career satisfaction does not depend on being the record holder.

"The fact that we are equal at 20, the only thing that says is that we share an amazing [time] of the history of our sport, and for me it's a real honour to be part of it, without a doubt," he said.

"I don't hope for anything. I just keep going. I am just enjoying playing tennis, as I said hundreds of times. Honestly, and from the bottom of my heart, I really don't [have certain expectations].

"Of course, I want to keep winning, but more than because I want to achieve or I want to have more than the others, because I love what I am doing. I want to keep doing this as long as possible.

"The last six months there have been a lot of doubts if I would be able to keep going. But now I feel good. We are in a position that I won a tournament, I'm in the semi-finals of the Australian Open, so that's amazing for me.

"In terms of what can happen in the future, honestly I really don't care that much. I don't believe that my happiness, my future happiness depends on if I achieve one more grand slam than the others or if the others achieve more grand slams than me.

"No, I am super satisfied and feel very lucky for all the things that happen to me. I have a way to approach life. You can't be always frustrated if the neighbour has a bigger house than you or a better phone or a better thing, no? I'm not going to be frustrated if Novak or Roger finishes their careers with more grand slams than me.

"Let's enjoy the situation, every one of us, we did very special things in our sport. Let's enjoy that."

Nadal lost to Djokovic in the Melbourne final in 2019. He has reached the showpiece match five times in total.

The world number five had not played a competitive game since August last year before he returned to action earlier this month, winning the Melbourne Summer Set.

Nadal had dropped just one set across the opening four rounds prior to his clash with Shapovalov, which finished 6-3 6-4 4-6 3-6 6-3.

"Yeah, I have been playing well," Nadal added. "To play at this level against a player like [Shapovalov], that he's one of the best players of the world, and see myself again competitive against these kinds of players, for me it's everything.

"I'm just enjoying every single moment, try my best playing with the highest positive attitude possible and with the right spirit."

Ash Barty was told how her backhand slice has been compared to that of Roger Federer, but the women's top seed at the Australian Open is not convinced.

Barty produced a stellar display as she saw off Jessica Pegula in Tuesday's quarter-final, losing just two games over the entire duel as the American proved no match.

Her victory sets up a semi-final clash with another American, Madison Keys, with Barty aiming to reach the final of her home grand slam for the first time.

Barty was ruthless against Pegula, firing 17 winners to her opponent's seven, while she won five of the nine break points available to her.

But it was her backhand slice – one of the most recognisable shots in the women's game today – that was particularly notable to four-time grand slam winner Jim Courier in commentary, who compared Barty in this respect to Federer.

Not that Barty was having any of it.

"That's very kind from Jim," Barty told reporters afterwards. "I think everyone's shots are unique.

"I think obviously Roger has one of the most exceptional slice backhands in the game. Mine's a long way off that. Absolutely, no stretch of the imagination we are even on the same page at all.

"But I love to use my slice, I love to get creative with it, to use it offensively and defensively. Over my career I've learnt it is a weapon for me.

"I try and use it when I have to. Sometimes I try and use it when it's my choice and I can be really, really aggressive with it.

"But being able to use it with variety and have different options has been a massive part of my game through this last couple of years of my career."

When Barty faces Keys in the semi-final, she will have already matched her personal best at the Australian Open – she also reached the last four in 2020.

But the combination of being world number one for over two years and having two grand slams under her belt is helping her maintain focus this time around.

"[It's] a bit of both. I think the process hasn't changed, but obviously the familiarity of knowing what to expect or expect how my body feels and almost be able to deal with those emotions a little bit better has probably changed and grown as I've become more experienced," she continued.

"But the processes for us haven't changed regardless of whether it's a first round of the tournament, latter stage of a grand slam, it doesn't actually matter the process before we walk out on court.

"But it's exciting, and I think also being able to embrace the excitement of being in with a chance to play deep in your home slam, it's pretty cool. I think going out there and enjoying that and really embracing that experience helps for sure."

Rafael Nadal shot down Denis Shapovalov's suggestion that he receives special treatment from umpires after an epic Australian Open quarter-final tussle.

Shapovalov fell short of an incredible comeback against the record-chasing Nadal, who prevailed 6-3 6-4 4-6 3-6 6-3 after over four hours of action on Rod Laver Arena.

The match was full of tension, with Shapovalov furious that Nadal escaped a time violation for taking too long between the first and second sets. 

After umpire Carlos Bernardes refused to call time on Nadal's changeover, Shapovalov lost his temper, bursting out: "You guys are all corrupt."

The players subsequently met at the net for a discussion, but Shapovalov was frustrated again when, before the deciding set, Nadal left the court for a medical timeout having struggled with a stomach issue, but then also had a toilet break.

Asked in his post-match news conference if he felt Nadal received preferential treatment, Shapovalov said: "Of course. 100 per cent he does. 100 per cent."

Shapovalov's comments were put to Nadal in the Spaniard's own media conference.

"No. Not in that case, no, no," Nadal responded.

"I really believe that on the court you don't deserve better treatment than the others. I really don't want it and I don't feel I have it.

"Without a doubt, even as everybody knows, I have a huge respect for Carlos and I think he's a great umpire. Is it not the case that he was always hard with me on court, no?

"I really believe that it's always in the mind that the top players get bigger advantages. And on the court it's not true. That's my feeling. I never feel that I had advantages on the court, and I really believe that he's wrong in that case.

"I honestly feel sorry for him. I think he played a great match for a long time. Of course, it's tough to accept to lose a match like this, especially after I was feeling destroyed and probably he felt that, [but] then I was able to manage to win the match.

"I wish him all the very best. He's young, I think we all make mistakes on our careers. I made a lot of mistakes too when I was younger, and probably he will understand later on after he thinks the proper way that probably he was not right today."

Nadal also explained why he had to be given an extended amount of time in the changeover between the first and second sets.

"I took some extra time at the end of the first set because I had to change everything there on the chair, in the changeover," he said.

"I think in that case normally at the end of the sets the umpire gives you some extra time, especially under these very humid conditions to change the clothes, because that's obvious that you can't play with the clothes in the condition that I was [in].

"I think in that moment Denis got p***** because the umpire called time and I needed like 30 seconds extra to keep changing my clothes.

"I think it's fair that Carlos gave me this extra time at that moment. I think Carlos made a small mistake in calling time. Normally at the end of the set, the umpire looks around and waits a little bit to call time until the player is a little bit ready when he's changing, no?

"Denis was wrong in that case. I understand that he just lost the set and in some way he wanted to keep playing quick, but I think he understands that normally you have some time to change your clothes."

Nadal improved his record in grand slam quarter-finals to 36-9. He is now 7-7 in Australian Open quarter-finals after surviving the Shapovalov battle, far worse than his record at the French Open (14-1), Wimbledon (7-0) and US Open (8-1).

Two-time Grand Tour winner Egan Bernal is in intensive care after undergoing surgery on his spine following a training crash.

Bernal was training near his hometown in Bogota when the accident happened on Monday and was taken to the Clinica Universidad de La Sabana to receive treatment.

According to local media reports, the 25-year-old struck a parked bus while riding at a high speed and suffered fractures in his right leg and kneecap as well as a collapsed lung.

The 2019 Tour de France and 2021 Giro d'Italia winner was said to have been "stable" in a statement released by his Ineos Grenadiers team on Monday.

Bernal has since undergone further surgery to repair dislocated fractures in his spine.

A statement from the hospital on Tuesday confirmed the operation had "kept intact the neurological integrity and conserved the functionality of the segments involved".

"We'll wait for his progress over the next 72 hours in the Intensive Care Unit to see the response to the treatment established for this high-energy trauma," the statement added. 

"We have immediately begun the rehabilitation process to achieve the best possible results with our patient."

Bernal, who has suffered with a recurring back problem over the past two years, extended his contract with Ineos Grenadiers to 2026 earlier this month.

Denis Shapovalov regrets labelling umpire Carlos Bernardes as "corrupt" but refused to relent on his view that Rafael Nadal "100 per cent" gets preferential treatment from officials.

Canadian Shapovalov fell short in a valiant comeback bid against all-time great Nadal, who eventually won through 6-3 6-4 4-6 3-6 6-3 after over four hours on Rod Laver Arena.

The 14th seed was left fuming between the first and set second, though, when he felt a time violation should have been given after Nadal made him wait for play to resume.

"Started the clock so long ago, he's still not ready to play. You've got to call him," Shapovalov said to Bernardes.

After Bernardes opted against doing so, Shapovalov said: "You guys are all corrupt."

"I think I misspoke when I said he's corrupt or whatever I said. It's definitely emotional, but I do stand by my side. I think it's unfair how much Rafa is getting away with," Shapovalov told a news conference when asked about the incident.

"I mean, I'm completely ready to play and the clock is ticking three, two, one, clicking towards zero, and I'm looking at the ump, and obviously I'm going to speak up and say something. 

"I've been ready to play for a minute and a half, and he tells me he's not going to give him a code violation because I'm not ready to play. To me, it's a big joke if somebody says that."

Shapovalov was further frustrated ahead of the deciding set where Nadal left the court for a medical check up having struggled with a stomach issue and also had a toilet break.

The 22-year-old felt the extended break quelled his growing momentum and that the elite players have different boundaries.

"And then after the fourth set, the guy goes – and for the same thing last year I wasn't allowed to take a toilet break when I asked for a medical," he added.

"He had already taken two medicals. He was getting medically evaluated, that's what the ump said after the fourth set, getting medically evaluated, and after the evaluation the guy goes and takes a toilet break.

"It's like, where is the line? Where are you going to step on the players and again, I respect everything that Rafa has done and I think he's an unbelievable player. 

"But there's got to be some boundaries, some rules set. It's just so frustrating as a player. You feel like you're not just playing against the player; you're playing against the umpires, you're playing against so much more.

"It's difficult. I mean, it was a big break after the fourth set for this reason, and the momentum just goes away. It's much more difficult to play, I think.

"Again, not trying to say anything against Rafa; he's a great player, I really respect all he's done, but I just think it's super difficult and super frustrating as an athlete to go up against all of this."

Asked if he feels Nadal gets preferential treatment, he added: "Of course. 100 per cent he does. 100 per cent. Every other match that I have played, the pace has been so quick because the refs have been on the clock after every single point.

"This one, after the first two sets it was like an hour and a half just because he's dragged out so much after every single point. He's given so much time in between sets and all this. It's just dragged out.

"Like I said, for the same reason I wasn't allowed to go to the washroom last year at the Australian Open because I had called a medical. I'm not arguing the fact that he had a medical or whatever it is. But how can you get evaluated medically and have a toilet break at the same break and just causing so much delay in the game?

"I mean, it's just not balanced."

Shapovalov and Nadal had a discussion at the net, but the former explained that it was an amicable exchange.

"It was nothing against Rafa. Rafa was serving and I would expect the umpire to be looking at Rafa and the umpire was staring me down. It didn't make sense to me," he said.

"Rafa is getting ready to serve, there's a clock right there, as an umpire you should be looking at the server. The guy is staring me down so I just looked at him like, 'Why are you looking at me?'

"It was shortly after I had said – obviously, like I said, I misspoke, but he was staring me down, so I felt like there was some feud or something. I looked at him.

"I was just explaining that to Rafa that it had nothing to do with him."

Nick Kyrgios is hoping to inspire the next generation of tennis stars after taking centre stage at the Australian Open with his run to the men's doubles semi-finals.

The 26-year-old fan favourite and partner Thanasi Kokkinakis downed sixth seeds Tim Puetz and Michael Venus 7-5 3-6 6-3 in Tuesday's quarter-final clash.

The contest was watched by a lively crowd on Kia Arena and overshadowed Rafael Nadal's five-set win over Denis Shapovalov on Rod Laver Arena at the same time.

Kyrgios and Kokkinakis, who were given a wildcard into the draw after being knocked out of the singles early on, will now face Marcel Granollers and Horacio Zeballos.

"I'm not finished – I want to win this f****** thing," Kyrgios declared in his on-court interview. "We know what we do well and it's world-class. 

"That's what we'll do again. I just want to play and give the people of Australia a show and genuinely grow the sport of tennis."

Kyrgios showed his caring side early in the match when handing a racket to a fan in the crowd after accidentally hitting the youngster with one of Kokkinakis' faulted balls.

The Australian public have embraced the pair's deep run in the competition and Kyrgios, often a controversial character, is glad to see so many younger spectators watching on.

"There is no way around it; me and Thanasi are definitely role models to the youth in Australia. We obviously attract that crowd," he said at his post-match news conference.

"I know that over the years I haven't been the best role model, but I was just learning how to deal with everything. 

"I think now at 26 I have matured, and I've definitely realised that a lot of young kids and people, even people that are low on confidence, they do look towards us.

"We are not special people. We're normal humans that you might see walking in Australia, and we are now in the semi-finals of a grand slam.

"I feel like I think we are just relatable. I think that's what's the best thing about it. They go out and get behind their mates. Most of the guys in the crowd are our mates.

"You've got Roger Federer and these guys that are just once-a-generation athletes. I can't be like that. We're not like that. I feel it has to be people that are a bit more relatable."

The Aussie pair's next opponents Granollers and Zeballos have won six tour-level titles as a team, but have never gone all the way at a grand slam.

Kokkinakis is hoping to have similar backing from the expectant home fans on Thursday.

Asked about the support he and his doubles partner have received so far, Kokkinakis said: "The rowdier the better. Sink p*** and come here.

"The next guys are experienced veterans, but we're going to keep playing how we play, have fun and enjoy the crowd."

Ash Barty was in clinical form to swat aside Jessica Pegula 6-2 6-0 in just 63 minutes and book her spot in the Australian Open semi-finals.

The world number one is still to drop a set at her home slam in Melbourne and made easy work of her opponent as Barty continued her bid to become the first female Australian singles champion since Chris O'Neil in 1978.

Barty won nine games in a row from 3-2 up in the first set to take complete command and she can now prepare for a semi-final showdown with another American in the form of Madison Keys.

A nervy-looking Pegula was rushing her shots in the early exchanges and Barty broke in the first game when a forehand cross set up a break point chance that her opponent put into the net.

Barty had chalked up 12 unforced errors by game four, but it was her aggressive tactics that had Pegula completely on the ropes and when a thumping forehand set up another break point in game seven, it was little surprise when it was converted.

By this point Barty was in complete command and Pegula had no answer to the variety of shots her opponent rained down on her.

The second set raced by in just 28 minutes, with Barty putting the finishing touch on a mightily impressive performance when Pegula put a return long on the second match point.

"Jess is an incredible person and a brilliant girl. I love to test myself against her. She's had sensational couple of years, she's definitely a top-20 player, there's plenty more to come for sure," Barty said after the match.

On reaching the semis in Melbourne for the second time after doing so in 2020, she added: "I've grown as a person, as a player, I'm a more complete tennis player.

"Credit to my team, they do so much work behind the scenes to make me the best version of myself, I love playing out here. Hopefully I've got a little bit more left."

DATA SLAM: Barty serves up a treat again

Barty defeated both Pegula and Keys en route to winning her maiden slam title at the 2019 French Open and history could be repeating itself here with the world number one playing arguably the best tennis of her career.

Behind her dominance is phenomenal success on serve. Barty is still yet to drop a set in Melbourne, and went 63 games without being broken before Amanda Anisimova did so in the previous round. Here, she lost just five points on first serve (22 of 27, 81 per cent) and gave up just a solitary break-point opportunity in the match.

WINNERS/UNFORCED ERRORS

Barty – 17/22
Pegula – 7/26

ACES/DOUBLE FAULTS

Barty – 6/2
Pegula – 1/3

BREAK POINTS WON

Barty – 5/9
Pegula – 0/1

Billy Donovan praised his short-handed Chicago Bulls side for coping with the "defensive pressure" applied by the Oklahoma City Thunder in Monday's narrow 111-110 triumph.

The high-flying Bulls have been faltering in recent matches and had lost six of seven heading into the contest but managed to see it out against the Thunder to improve to 29-17 for the season.

DeMar DeRozan was rested, while Lonzo Ball (bruised knee) and Alex Caruso (fractured wrist) were absent in a match where the Bulls had to withstand heavy fourth-quarter pressure.

"Two of our primary ballhandlers in Lonzo and Alex are not here," said head coach Donovan, a former Thunder coach who had a 243-157 record with Oklahoma.

"And when you get into these situations in the fourth quarter where teams turn up the defensive pressure and pick up full court, you've got to be able to handle it."

Nicola Vucevic had 26 points and 15 rebounds for the Bulls, while rookie Ayo Dosunmu put 24 for a season high and Zach LaVine contributed 23.

LaVine had not played since January 14 due to a bruised left knee and was happy to be back out on court for a Bulls side that lost by 19 points to the league-worst Orlando Magic last time out.

"It felt good," LaVine said. "I got tired of just sitting at home watching. I'm about as healthy as I can get, but it just sucks sitting at home and not being able to help."

Rafael Nadal survived a huge scare to reach the Australian Open semi-finals with an enthralling five-set win over Denis Shapovalov on Tuesday.

Nadal is two wins away from a record-breaking 21st grand slam title after enduring a four-hour epic to beat Shapovalov 6-3 6-4 4-6 3-6 6-3 on Rod Laver Arena.

A year after losing from two-sets-to-love up at the same stage to Stefanos Tsitsipas, there was almost a repeat for Nadal.

But, seemingly battling a stomach issue, the Spaniard remained alive in his bid to set the outright record for most grand slams won by a man, following a thrilling battle that lasted four hours, eight minutes.

The success saw Nadal – who will face either Matteo Berrettini or Gael Monfils in the last four – reach his 36th career grand slam semi-final and seventh at Melbourne Park, where he claimed the title in 2009.

Nadal landed the first blow with a break to love in the fourth game.

A superb forehand winner down the line got Nadal going before three wild forehands in a row from Shapovalov saw him fall 3-1 behind.

Shapovalov was unable to make any inroads against the Nadal serve, winning just five return points in a 39-minute opening set.

The Canadian was angry with chair umpire Carlos Bernardes' decision not to give Nadal a time violation between sets and the players unusually met at the net before the second game of the second set.

Nadal needed a tough hold during a 12-point sixth game and he capitalised in the next, an overhead securing the break after Shapovalov had sent a forehand well long at 30-30 to end a point he had been in complete control of.

Nadal closed out the set, but found trouble in the sixth game of the third as he faced break points for the first time after a double fault.

After saving both and holding serve, Nadal was broken at the key time – when serving to stay in the set – as Shapovalov delivered a backhand cross-court winner to extend the contest.

The momentum had well and truly swung and a double fault from Nadal saw Shapovalov break for 3-1 in the fourth set.

Approaching the three-hour mark, Nadal required a medical timeout, seemingly suggesting an issue with his stomach.

Shapovalov found himself in some trouble trying to level the match, but recovered from 15-40 to force a fifth set.

Nadal – who had been beaten from two-sets-to-love up just twice previously in his grand slam career – had to save a break point in the opening game of the decider, a volley winner to hold drawing huge cheers from the Rod Laver Arena crowd.

Instead, Shapovalov played a loose game, two wayward forehands, a double fault and a framed backhand giving Nadal a break and 2-0 lead.

Nadal, looking far more energetic, saved two break points in the third game before becoming more comfortable on serve on his way to the last four, Shapovalov smashing his racquet after match point.

DATA SLAM: Nadal overcomes major Melbourne hurdle … just

Nadal improved his record in grand slam quarter-finals to 36-9, but the last eight has often been a problem in Melbourne during his incredible career.

He is now 7-7 in Australian Open quarter-finals after surviving the Shapovalov battle, far worse than his record at the French Open (14-1), Wimbledon (7-0) and US Open (8-1).

WINNERS/UNFORCED ERRORS
Nadal – 41/28
Shapovalov – 53/51

ACES/DOUBLE FAULTS
Nadal – 8/11
Shapovalov – 20/5

BREAK POINTS WON
Nadal – 3/7
Shapovalov – 2/8

Denis Shapovalov hit out at chair umpire Carlos Bernardes in an extraordinary outburst during his Australian Open clash against Rafael Nadal.

Shapovalov was furious with Bernardes' decision not to call a time violation against Nadal after the Spaniard left him waiting between the first and second sets on Rod Laver Arena on Tuesday.

Nadal had taken the first set 6-3, but forced the Canadian 14th seed to wait before he could serve to start the second.

"Started the clock so long ago, he's still not ready to play. You've got to call him," Shapovalov said to Bernardes.

After Bernardes opted against doing so, Shapovalov said: "You guys are all corrupt."

Nadal and Shapovalov met at the net between the first and second games of the set in a brief discussion that eased the tension.

After Nadal led 6-3 6-4, Shapovalov hit back to take the third set 6-4 on a hot day in Melbourne.

Madison Keys is enjoying being the underdog after moving into the Australian Open semi-finals on Tuesday.

The American was too good for Czech fourth seed Barbora Krejcikova 6-3 6-2 in their quarter-final, played on a warm day in Melbourne.

Keys reached her fifth career grand slam semi-final, but first since the 2018 US Open.

Riding a 10-match winning streak after claiming just 11 victories in all of 2021, Keys is staying focused as her run continues in Australia.

"I honestly feel pretty neutral, to be completely honest with you. I have gone into every match thinking I can absolutely win any match that I'm out on the court," she said.

"I will say it's been kind of nice to be the underdog for the first time in a long time.

"It's really just not even in my head about winning and losing. It's really just going out, competing, trying to do what the game plan is.

"If that's not working going to Plan B. The rest is kind of not even getting into my brain."

The heat on Rod Laver Arena seemed to get to Krejcikova, the French Open champion taking a medical timeout late in the first set.

Krejcikova said she would learn a lot from her run after struggling with the heat on Tuesday.

"Today it was the heat with some physical conditions that started to bother me during after five games. I mean, from there on, you know, I just couldn't put it together," she said.

"Just still I didn't want to end it up. I wanted to finish match. I wanted to try to do my best. Yeah, I wasn't really able to do that. Still I think it's a really good experience and I can learn a lot from it."

Keys will play either Ash Barty or Jessica Pegula in the last four.

Chris Paul inspired the Phoenix Suns to a 115-109 victory over the Utah Jazz as the NBA leaders matched their best start to a season in franchise history.

Devin Booker top-scored for the Suns with 33 points, but it was Paul's season-high 27 that got his side out of a hole against a shorthanded Jazz.

The visitors led 87-85 at the end of the first quarter at Footprint Center and moved to 95-91 early in the second quarter as they went in search of just a third win in 10 games.

But point guard Paul stepped up for the Suns by making his first five shots in the fourth quarter, including a couple of 3-pointers, as the hosts responded with 14-2 to take the win.

Monty Williams' side are now 37-9 for the season, equalling their franchise record from 2006-07, ahead of facing the same opponents again on Wednesday.

Cavs hold off Knicks thanks to Garland

Darius Garland tied LeBron James' streak of 10-or-more assists in five straight games for a Cleveland Cavaliers player over the past decade in a tense 95-93 win over the New York Knicks.

The 21-year-old point guard recorded 12 assists in total and added a critical late 3-pointer as the Cavs held off a late charge from the Knicks, who trailed 86-71 with 9:41 left in Ohio.

Kevin Love led the scoring with 20 points, nine of those coming in just over a minute in the third quarter, as the Cavs went 10 games over .500 for the first time since the days of James in 2018.

Pelicans power past Pacers

Elsewhere in Monday's action, the New Orleans Pelicans trailed for a large portion of the game but had enough in the tank to beat the Indiana Pacers 117-113.

Josh Hart played through the pain barrier to inspire the Pelicans with 22 points and 10 rebounds, adding to Devonte' Graham's 22 points.

The Chicago Bulls put a poor run of six defeats from seven games behind them by beating Oklahoma City Thunder 111-110 in a tense encounter.

Nikola Vucevic's 26 points and 15 rebounds were nearly not enough as the Thunder, who trailed by 28 points, missed a 3-pointer through Shai Gilgeous-Alexander late on to level the contest.

Madison Keys moved into her first grand slam semi-final since 2018 with a straight-sets win over Barbora Krejcikova at the Australian Open.

Keys overcame Czech fourth seed Krejcikova 6-3 6-2 in hot conditions on Rod Laver Arena on Tuesday.

After a hard-fought 50-minute first set, Keys handled the heat the better of the two, closing out a deserved victory.

The win booked Keys a first major semi-final since the 2018 US Open and fifth of her career, with either Ash Barty or Jessica Pegula awaiting her.

After claiming just 11 match victories in 2021, Keys is on a 10-match winning streak, although she was challenged by Krejcikova, particularly early on.

A pair of break points went begging for Keys in the second game before she dug herself out of a 15-40 hole to hold for 2-1.

Keys held after a gruelling 18-point fifth game, one which looked set to be hugely important, after saving four break points.

Another lengthy game followed as opportunities, this time for Keys, came and went before Krejcikova sent a forehand wide to hand the American a 4-2 lead.

Krejcikova took a medical timeout at 2-5, but there was no stopping Keys taking the first set in 50 minutes.

The unforced errors continued to come from Krejcikova and a tame backhand into the net handed Keys a break in the opening game of the second set.

Looking increasingly weary, Krejcikova was broken to love in the third game, although the French Open champion did get one of those breaks back immediately.

Krejcikova continued to fight, but Keys powered away, breaking for 5-2 on her way to the last four.

DATA SLAM: Keys lands top-five win

Keys, the 2017 US Open runner-up, held an 8-20 record against top-five ranked opponents, and 2-6 at grand slams, heading into her meeting with Krejcikova.

The American at least improved that record and deservedly so, getting the better of Krejcikova.

WINNERS/UNFORCED ERRORS
Keys – 27/21
Krejcikova – 12/28

ACES/DOUBLE FAULTS
Keys – 11/1
Krejcikova – 2/4

BREAK POINTS WON
Keys – 4/12
Krejcikova – 1/8