Daniil Medvedev's temper threatened to boil over during his match against Maxime Cressy, as the world number two reflected on a "crazy" final set.

Medvedev beat Cressy 6-2 7-6 (7-4) 6-7 (4-7) 7-5 on Monday to ensure his place in the quarter-finals of the Australian Open.

The second seed is the fifth Russian man in the Open Era to reach the quarter-finals in Melbourne on multiple occasions, joining Yevgeny Kafelnikov (five), Nikolay Davydenko (four), Aleksandar Metreveli and Marat Safin (both three).

Medvedev had it far from easy against the world number 70, who reached the final of the Melbourne Summer Set earlier this month, losing to Rafael Nadal, and the match lasted three hours and 30 minutes on Margaret Court Arena.

Indeed, Medvedev was extremely tense in the fourth and what proved to be final set, as he squandered eight chances to break before finally doing so to nudge himself into a 6-5 lead. 

His temper frayed at 2-2, however, with Medvedev shouting: "It's simply unbelievable how lucky he is. I've never seen anything like this in my life."

Medvedev eventually served out the win, taking the first match point on offer, but the US Open champion knew he had been in a battle.

"He really did [serve and volley] well," Medvedev said. "First set I had control, but the second set I didn't manage to break him but won the tie-break and just wanted to continue this way.

"When I lost the third [set] and when I had eight break points in the fourth set, I was like, come on. Some of them I could have won, but he played well, but on the last one I played well.

"It was not easy. If I didn't win the fourth [set] I'd have probably been in a difficult mental shape because I had so many breakpoints. Hell of a match. The fourth set was crazy."

Overall it was a deserved win for Medvedev, who made only 11 unforced errors in contrast to Cressy's 49, and even if he only took three out of 12 break points, the 25-year-old offered up just one to his opponent, which the French-born American failed to capitalise on.

Another annoyance for Medvedev was that he was again scheduled to play on Margaret Court Arena, rather than the crown jewel at Melbourne Park, Rod Laver Arena.

"I really don't know what I should do to play on centre court here," he told reporters.

Next up for Medvedev is a quarter-final tie against ninth seed Felix Auger-Aliassime.

Medvedev has defeated the 21-year-old Canadian in all three of their previous meetings on the ATP Tour, including in his successful run to US Open glory last year, and in the ATP Cup earlier this month.

An emotional Alize Cornet said "it is never too late to try again" after reaching her maiden grand slam quarter-final with victory over Simona Halep at the Australian Open.

Cornet, who celebrated her 32nd birthday on Saturday, battled to a 6-4 3-6 6-4 victory in stifling conditions on Rod Laver Arena to set up a last-eight showdown with Danielle Collins, who beat Elise Mertens in three sets.

The Frenchwoman has now defeated two in-form former number ones in Halep and Garbine Muguruza, having also recovered from a set and 1-4 down to overcome Tamara Zidansek.

She is through to her first quarter-final in what is her 63rd grand slam appearance and is the first Frenchwoman to reach this stage at Melbourne Park since Marion Bartoli in 2009.

Cornet is playing in her 60th straight major, and should she compete in the main draws at Roland Garros, Wimbledon and Flushing Meadows, will set a new record for consecutive appearances in grand slams.

"It feels amazing," Cornet said in her on-court interview with Jelena Dokic. "It was a battle with Simona today. In this heat after 30 minutes we were both dying on the court.

"We kept going for two and a half hours with all our heart. Congrats to Simona because I know she struggled a lot and I admire this player so much. 

"She's such a fighter and an example to me. To beat her today to go to my first quarter-final is a dream come true. I don't know what to say. It's just magic. It's never too late to try again.

"This is why I keep playing tennis, for this moment where I can share all these emotions on the court with you."

Cornet had reached the last 16 at majors on five occasions prior to her victory over Halep in a run dating back 13 years when narrowly missing out on the Australian Open quarter-finals.

She was pegged back from a set and break up against Halep, losing 16 straight points at one point, and was clearly struggling with the heat as the match dragged into a decider.

But Cornet, who recently suggested this might be her final season playing professional tennis, showed incredible resolve to break Halep in the seventh game and hold her own serve to break her quarter-final hoodoo.

Halep congratulated Cornet, posting to her official Instagram account: "You have been stronger today! All the respect for you, Alize. Enjoy. I'll keep working to get better for another three-hour match when we meet again."

In her post-match media duties, Halep said: "I have only nice words about her, because I like her on court, how she's fighting.

"She deserves what is happening to her now. She works hard all the time, and I wish her good luck. I really want her to make this dream coming true."

There was to be another emotional moment for Cornet at the end of her victory speech as she praised 2009 Australian Open quarter-finalist Dokic for her work off the court since retiring eight years ago.

"I want to thank my box, but also I want to tell you something... how you moved on in your life, I think we can all congratulate you. You were an amazing player and now an amazing commentator," Cornet said as the pair embraced on court.

Dokic, who last week called out social media trolls for body-shaming her, responded: "You just made me cry. I can’t believe I'm crying. Thank you. Alize Cornet."

Matteo Berrettini made Italian tennis history on Sunday as he blasted his way past Pablo Carreno Busta and into the Australian Open quarter-finals.

The seventh seed won 7-5 7-6 (7-4) 6-4 in a gruelling contest to set up a last-eight clash with Gael Monfils, who earlier beat Miomir Kecmanovic.

Berrettini is the first men's player from his country to reach the quarter-final stage of all four grand slams in the singles draw, and only the 10th active player to achieve the feat.

The 25-year-old only reached this stage of a major for the first time in 2019 and has since gone as far as the final in Wimbledon last year, where he lost to Novak Djokovic.

Having withdrawn from his round-of-16 match with Stefanos Tsitsipas in Melbourne in 2021 due to an abdominal injury, Berrettini was delighted to have progressed.

"It was really tough last year. I really wanted to play, but I couldn't with the tear in the ab," he said.

"But I believe there is a reason for everything that happens and I've been wishing to come back as soon as possible and the way I won today shows how much I care about this tournament."

Berrettini had luck on his side in the first set as two netcords on Carreno Busta's serve allowed him to break for a 6-5 lead.

Once ahead in the match, his serve and baseline power became too much for the Spaniard: Berrettini rained down 28 aces, winning 87 per cent of points behind his first serve, and hit 57 winners.

"I was really precise with my serving and he wasn't reading my serve, which is why I hit a lot of aces," he said.

Next up is a meeting with Monfils, who has now reached 10 slam quarter-finals in his career and a first in Australia in six years.

These two met at the same stage of the 2019 US Open, Berrettini prevailing in five sets after losing the first two. The winner could face Rafael Nadal in the semi-finals.

"It's been a long journey for me and I'm quite happy, but it's not finished," said Monfils. "I will try to play this quarter-final not like the last time. I will try to be better.

"It's an achievement but we're not quite finished yet."

World number one Ash Barty promised to carry on playing her own game after booking her spot in the last eight of the Australian Open.

Barty, the top seed, defeated Amanda Anisimova 6-4 6-3 on Sunday to progress to the quarter-finals in Melbourne for a fourth successive time.

Anisimova defeated last year's champion Naomi Osaka in the last round, but she proved no match for Barty, who sealed the win in 74 minutes.

Barty did see her run of holding serve ended, however, after 63 games without being broken, though it was a minor blip in another convincing win. 

Indeed, the 25-year-old has now won all four of her Australian Open ties without dropping a set.

Asked what was key to her dominant form, Barty said: "I think the most important thing is I just try to be me, continue to be me, that's all I can do.

"That's what I’m good at, that's who I and who I want to be."

Her comments were well received by the crowd at Rod Laver Arena, and Barty is delighted to be playing in front of spectators once again.

"The last two years have been extraordinarily tough for a lot of people around the world," she said.

"To have the crowd here, it brings a lot more to the tennis. It makes it a lot more enjoyable for me to play at home."

Barty struck seven aces and registered a first-serve percentage of 78, while also hitting 23 winners and making exactly half the amount of unforced errors as Anisimova (17 to 34).

"Amanda is an incredible athlete and incredible competitor. It's nice to see her back playing her best tennis," Barty continued.

"I enjoyed sharing the court with her and testing myself against her. It was nice to be able to hold firm tonight."

Asked in a post-match news conference about dropping serve for the first time in eight matches, Barty replied: "It didn't bother me too much.

"Honestly, I'm not counting how many games I hold in a row or not. The fact I was able to reset, break straight back, was really important, just to be able to reset myself, go again and continue to do the right things."

Next up for Barty, a two-time major winner who is yet to taste victory in her home grand slam, is another American in the form of Jessica Pegula, who upset fifth seed Maria Sakkari 7-6 (7-0) 6-3.

"It's going to be a challenge for me to try and push her off that baseline and make her uncomfortable and feel like she has to create," Barty told reporters.

"But I know that she's also going to be doing the exact same thing to me and trying to make me uncomfortable.

"That's the chess game that we play. You go out there and have fun with it, see who can execute better on the day, and that's about all there is to it."

Denis Shapovalov said it is a privilege to be facing Rafael Nadal in the Australian Open quarter-finals after his win over Alexander Zverev, who conceded "everything" went wrong.

Zverev had been looking sharp in Melbourne over the last week, with the world number three not dropping a single set en route to the last 16.

Yet the Olympic gold medallist was on the end of a straight-sets loss on Sunday as he went down 6-3 7-6 (7-5) 6-3 to Shapovalov.

Zverev made 32 unforced errors, five fewer than Shapovalov, and managed to convert only two of five break points, with the German winning 46/67 first-serve points.

Asked what went wrong, Zverev bluntly told reporters: "Everything.

"It's no one else's fault. It's not the coach's fault, it's not my team's fault, it's no one else's fault. It's purely me.

"As world number three, I have to take responsibility for the things I do and don't do.

"I give credit to Denis. It's incredible that he's in the quarters, I think he deserves it. He's done a lot of work, improved his game.

"But I've got to look at myself. Today was just, in my opinion, awful from my side."

Shapovalov had lost to Zverev in the ATP Cup earlier this month, but after Sunday's win the duo's head-to-head record stands at 4-3 in the latter's favour.

The 22-year-old Canadian will now face Nadal, with the 20-time grand slam winner having progressed to his 14th Australian Open final by defeating Adrian Mannarino.

Nadal holds a 3-1 head-to-head record against Shapovalov, though this will be the first time the pair have met in a major.

"It's always an honour to go up against a guy like Rafa," said Shapovalov after reaching his first Australian Open quarter-final.

"It's always going to be a battle against him. It's going to be a tough one and I'm definitely going to enjoy it."

Reflecting on just his second career win over a player in the top five, Shapovalov said: "I think off the ground I was playing really well, really feeling my shots off both wings.

"I played pretty smart, it felt like things were going my way early on. I lost a little bit of momentum midway in the second set but fought well to come back and just kind of rolled with it after."

It was also the first time in the tournament that Shapovalov had not had to go to at least four sets.

"It's probably the one I least expected to finish in three. I'm very happy with my performance, definitely happy with where my game is at," he added.

Ash Barty's dominant form at the Australian Open continued as the world number one saw off Amanda Anisimova to reach the quarter-finals.

Anisimova shocked 2021 champion Naomi Osaka in the last round but the in-form Barty proved a step too far on Sunday.

Barty had not dropped a set in any of her previous matches and the Australian continued that trend with a 6-4 6-3 triumph that took just 74 minutes.

The 25-year-old missed five chances to break before she finally nosed herself ahead in a tightly contested first set when Anisimova went long.

Anisimova made the same mistake in the next game, failing to grasp the opportunity for an immediate response, and Barty struck a forehand winner to claim the set.

World number 60 Anisimova responded by racing into a 40-0 lead at the start of the second set, only for some sloppy shots to allow Barty to haul herself level.

The American held her nerve though and looked to be right back into it when she broke Barty in the next game.

Yet two-time major winner Barty hit straight back, with a missed backhand from Anisimova gifting her a reprieve, and she did not look back, holding serve before breaking again to go 4-3 ahead.

Anisimova saved two match points in her win over Osaka, yet another overhit backhand sent Barty through to a tie against Jessica Pegula at the first time of asking.

DATA SLAM: BARTY'S HOLD STREAK OVER

There was one negative for Barty, who failed to hold serve for the first time in 63 games when she was broken in the second set. However, the Queenslander responded to that streak ending with a display of her title-winning quality to reach a fourth successive Australian Open quarter-final.

WINNERS/UNFORCED ERRORS

Barty – 23/17
Anisimova – 20/34

ACES/DOUBLE FAULTS

Barty – 7/3
Anisimova – 4/1

BREAK POINTS WON

Barty – 4/11
Anisimova – 1/5

Rafael Nadal reflected on being "a little bit lucky" to win a crucial first-set tie-break after he progressed to the Australian Open quarter-finals.

Nadal saw off Adrian Mannarino 7-6 (16-14) 6-2 6-2 on Sunday to seal his place in the last eight of the season's first grand slam for the 14th time.

The 20-time major winner, however, needed to overcome a stern challenge in the first set, winning a 30-minute tie-break.

Indeed, Nadal had to claw back four set points in the tie-break, before an early break in the second paved the way for a much simpler time from then on in against an opponent who had played late into the night in the previous round.

"The first set had been very, very emotional," Nadal said. "Anything could happen there. I was a little bit lucky at the end.

"Everybody knows how mentally [tough] this game is.

"It was a tough one and after that crazy first set, I think it was so important the break at the beginning of the second set.

"His ball was very difficult to control, very flat, very fast. I'm very happy that I survived that first set, without a doubt."

Nadal has only won the Australian Open once before, back in 2009, but his quest to land a record 21st grand slam title is going well so far.

"In this tournament I think I have been in a very good position to fight for it a lot of times in my career," Nadal added.

"I've always enjoyed playing in it a lot of times in my career. It's true that I was a little bit unlucky with injuries here, and sometimes I was unlucky because my opponents were a little bit better than me!

"But I've always enjoyed it and I'm very happy to be back in a quarter-final, it means a lot to me."

The Spaniard's hopes received another boost on Sunday, when world number three Alexander Zverev was knocked out by Canada's Denis Shapovalov, who will be Nadal's quarter-final opponent.

It will mark the fifth contest between 22-year-old Shapovalov and Nadal, with the latter having won three of their previous encounters.

"Shapovalov is a player with amazing potential," Nadal said.

"Everybody knows that when he's playing well, it's very difficult to stop him with [his] big serve, amazing forehand, and he's very quick."

Rafael Nadal overcame a marathon first-set tiebreaker to move into the Australian Open quarter-finals with a straight-sets win over French veteran Adrian Mannarino on Sunday.

Nadal continued on his search for a record-breaking 21st grand slam title with the 7-6 (16-14) 6-2 6-2 victory at Rod Laver Arena.

The Spaniard will take on either third seed Alexander Zverev or Canadian 14th seed Denis Shapovalov in the last eight on Tuesday. The win marks Nadal's 14th appearance in the Australian Open quarters.

Nadal has only dropped one set in his first four matches at the Australian Open but the opening set against Mannarino was epic, with the sixth seed edging his opponent after 80 minutes.

The 2009 Australian Open winner trailed 3-0 in the tie-break but fought back to level it up, eventually taking the set 16-14 with his seventh set point.

Nadal assumed complete control from that set on, dominating the second and third to win in two hours and 40 minutes.

The 35-year-old was powerful, sending down 16-7 aces, while he won 88 percent on his first serve across the match. Nadal only offered up two break points for the match.

DATA SLAM: Nadal on the right track

Nadal has dropped 38 games across his four matches at the Australian Open, making light work of Mannarino in the latter two sets which collectively took as long as the first.

The Spaniard won in Melbourne in 2009 but lost finals in 2012, 2014, 2017 and 2019, yet without Novak Djokovic and Roger Federer at this year's event it looms as his best chance for years to lift the title and he seems in good health and form. 

WINNERS/UNFORCED ERRORS

Nadal – 42/22

Mannarino – 37/34

ACES/DOUBLE FAULTS

Nadal – 16/6

Mannarino 7/4

BREAK POINTS WON

Nadal – 5/17

Mannarino – 1/2

Rafael Nadal overcame a marathon first-set tiebreaker to move into the Australian Open quarter-finals with a straight-sets win over French veteran Adrian Mannarino on Sunday.

Nadal continued on his search for a record-breaking 21st grand slam title with the 7-6 (16-14) 6-2 6-2 victory at Rod Laver Arena.

The Spaniard will take on either third seed Alexander Zverev or Canadian Denis Shapovalov in the last eight on Tuesday.

Nadal has only dropped one set in his first four matches at the Australian Open but the opening set against Mannarino was epic, with the sixth seed edging his opponent after 80 minutes.

The 2009 Australian Open winner trailed 3-0 in the tie-break but fought back to level it up, eventually taking the set 16-14 with his seventh set point.

Nadal assumed complete control from that set on, dominating the second and third to win in two hours and 40 minutes.

The 35-year-old was powerful, sending down 16-7 aces, while he won 88 percent on his first serve across the match. Nadal only offered up two break points for the match.

DATA SLAM: Nadal on the right track

Nadal has dropped 38 games across his four matches at the Australian Open, making light work of Mannarino in the latter two sets which collectively took as long as the first.

The Spaniard won in Melbourne in 2009 but lost finals in 2012, 2014, 2017 and 2019, yet without Novak Djokovic and Roger Federer at this year's event it looms as his best chance for years to lift the title and he seems in good health and form.

WINNERS/UNFORCED ERRORS

Nadal – 42/22

Mannarino – 37/34

ACES/DOUBLE FAULTS

Nadal – 16/6

Mannarino 7/4

BREAK POINTS WON

Nadal – 5/17

Mannarino – 1/2

Two-time major winner Simona Halep says she is playing the best she has for months after cruising into the 2022 Australian Open fourth round with a straight-forward win over Danka Kovinic.

Halep, who is the 14th seed after an injury-ravaged 2021, eased past the Montenegrin 6-2 6-1 on Saturday. The former world number one has dropped only 14 games on her way to clinching a spot in the second week in Melbourne.

The Romanian, who was the runner-up at the 2018 Australian Open, won the Melbourne Summer Set 1 title and is re-discovering her best form.

"(This is the best I've played in) the last months," Halep said after Saturday's win.

"I feel great physically, first of all. Mentally I'm confident and also strong, I would say.

"Feeling the game. Feeling joy out there. I think that helps me to be positive and to be confident that I have a chance every time I step on the court.

"I feel I'm in a good spot. I really trust that I can play good tennis here."

Halep will play Frenchwoman Alize Cornet in the fourth round on Monday, with the Romanian having won 11 consecutive sets.

Cornet had knocked out third seed Garbine Muguruza in the second round, while sixth seed Anett Kontaveit and US Open winner Emma Raducanu have also bowed out in Halep's quarter of the draw giving her a good shot at a deep run.

"I feel fresh. I feel that the pressure is off," Halep said. "I feel also that I have expectations from myself, but they are good expectations because I have worked a lot in the off-season.

"I have no injuries. That helps me to be in a good spot mentally and also with confidence."

Adrian Mannarino stumbled across the winning line at 02:33 local time as his late-night efforts at the Australian Open proved too much for last year's surprise package Aslan Karatsev.

A battling third-round performance from Frenchman Mannarino sets up a showdown with Rafael Nadal next, and the 33-year-old will hope he has sufficient energy left for that daunting task.

The left-hander clinched victory after four hours and 38 minutes of hard duelling with Karatsev on Margaret Court Arena, with a scattering of fans staying until the bitter end, long enough to hear Mannarino swear during his victory interview.

The watershed in Melbourne had of course long passed by the time Karatsev netted a backhand on match point.

After his 7-6 (7-4) 6-7 (4-7) 7-5 6-4 win, world number 69 Mannarino said: "I was enjoying it, you know. I love rallying, and I was just feeling in shape today, it was pretty cool to play."

But he was aware the match was running well into the early hours, saying: "I realised I was just looking at the clock sometimes, and I was thinking, 'F***'. I don't feel good to be honest'.

"I'm kind of exhausted. But it was cool, and I was so focused on what I had to do. I was not thinking about the fact I was tired.

"I was like, 'Okay, go get the next point'. The crowd was cool. Some people had a couple of drinks, I guess, and were commentating more than anybody."

Mannarino's win took him into the fourth round in Australia for the first time, and it meant he accounted for the 18th seed, a player who won the Sydney Classic last Saturday.

Karatsev reached the semi-finals at Melbourne Park last year as a virtual unknown, before going on to establish himself over the course of the season.

Remarkably, this Friday night into Saturday morning epic was far from the latest finish in Australian Open history, with Lleyton Hewitt having won a five-setter against Marcos Baghdatis at 04:34 local time in 2008.

Australian Open favourite Rafael Nadal reflected on a "very special week" after he progressed to the fourth round in Melbourne for the 15th time in his career.

Nadal cruised into a two-set lead against Karen Khachanov on Friday, though the Spaniard had to overcome a third-set fightback to win 6-3 6-2 3-6 6-1.

The 35-year-old - who triumphed at the Melbourne Summer Set earlier in January - has won all six of the matches he has played so far in 2022.

Nadal has endured a difficult time with injuries in recent seasons but, with Novak Djokovic out of the picture after his deportation from Australia this week, he has a record 21st grand slam triumph firmly in his sights.

"It is a very special week for me, coming back," said Nadal, who was out of action from August until December, when he played in an exhibition event in Dubai.

"Every single time I am able to play here is very special. I played against a great player and a good friend on Tour. It was my best match since I have come back without a doubt.

"I have gone through some very tough times over the past year, but nights like tonight mean everything.

"I keep fighting and going every day. I put a lot of effort in to be back with where I am today, so I am happy."

Nadal has won all eight matches against Russian Khachanov, and he will face Adrian Mannarino, whose four-set win over Aslan Karatsev concluded late into the Melbourne night.

He may only have won the Australian Open on one occasion, in 2009, but only Roger Federer (18) has reached the fourth round in Melbourne on more occasions than Nadal.

Rafael Nadal continued his search for a record-breaking 21st grand slam title with a routine victory over Karen Khachanov at the Australian Open.

The Spaniard, aiming to achieve the record for most grand slams won by a man, cruised past Khachanov with a 6-3 6-2 3-6 6-1 third-round victory at the first major of 2022 on Friday.

Nadal improved upon his perfect 7-0 record against the Russian, who he last faced at the 2019 Davis Cup Finals, and has only ever lost two of 20 sets in meetings between the pair.

The 35-year-old will now wait to see whether he faces Aslan Karatsev, the 18th seed in Melbourne, or Adrian Mannarino in the fourth round.

Nadal raced out the blocks, breaking the 25-year-old at the first time of asking as he grasped a 3-0 lead within the opening exchanges at Rod Laver Arena.

The 28th seed Khachanov fought back to 5-3 down but Nadal produced another dominant service to secure the first set, in which he dropped just one point on his serve.

A marathon first service game of the second set eventually ended with Nadal again breaking Khachanov after a gruelling 13 minutes and seven deuces before claiming the second set in straightforward fashion.

However, Khachanov – who managed silver at the Tokyo Olympics – bounced back in the third with Nadal making numerous mistakes and unable to cope with his mammoth forehand.

Nadal managed to regain his composure in the following set, celebrating enthusiastically after breaking Khachanov's first service game, before outclassing his opponent, who seemed to run out of steam in a match that lasted 2 hours and 51 minutes.

DATA SLAM: Nadal powers on at Melbourne Park

Nadal has lost on only two occasions in his career when boasting a two-set lead, with the most recent coming against Stefanos Tsitsipas in the quarter-final of this tournament last year.

Despite a spirited fightback from the Russian, Nadal moved onto a 72-15 record at the year's first major, with only Roger Federer (102) and Novak Djokovic (82) recording more victories at Melbourne Park.

WINNERS/UNFORCED ERRORS

Nadal – 39/30

Khachanov – 36/42

ACES/DOUBLE FAULTS

Nadal – 4/6

Khachanov – 14/3

BREAK POINTS WON

Nadal – 5/15

Khachanov – 1/5

Naomi Osaka is taking pride from her Australian Open campaign despite suffering a shock third-round exit to unseeded Amanda Anisimova on Friday.

The two-time Melbourne champion fell short in her latest title defence with a 4-6 6-3 7-6 (10-5) loss to Anisimova in a thrilling contest on Margaret Court Arena.

Osaka, who eased past Camila Osorio and Madison Brengle in straight sets in the first two rounds, squandered two match points to overcome 20-year-old opponent Anisimova.

It means the Japanese star has now failed to defend any of her four major crowns, with Victoria Azarenka the last women's player to do so at Melbourne Park in 2012 and 2013.

But competing in her first competitive event since exiting the US Open to Leylah Fernandez in September, Osaka was pleased with her efforts.

"I fought for every point. I can't be sad about that," said Osaka, who nearly walked away from tennis last year.

"I'm not God, I can't win every match. It would be nice to win the tournament, but I can't think of winning the grand slam at the start of the year every time.

"I feel like I grew a lot in this match. The last time I played in New York I think I had a completely different attitude, so I'm really happy, even though I lost. I'm happy how it went."

Osaka's Australian Open title defence has been halted by a breakthrough American talent for the second time, having previously lost to Coco Gauff at the same stage in 2020.

Despite match points passing the world number 13 by, she refused to be too downbeat by the manner of the defeat.

"There are days that I'm going to have bad days, and there are days that I'm going to have great days," she said. 

"It's always random, and I never know, but no matter what happens for me, I just want to leave the court knowing that I fought for every point.

"Today, of course there were things I felt I could improve on, but even with that, I had two match points, and I think that's something that I can be proud of myself for."

Osaka had dropped just one set in her first five matches this season and looked in the mood as she raced ahead against Anisimova.

But Anisimova hit more than twice the number of winners that Osaka managed (46 to 21) to pull off a huge upset and set up a last-16 clash with top seed Ash Barty.

The American lifted her second career title at Melbourne Summer Set 2 earlier this month and has now won 10 of the last 11 matches she has played, including all eight in 2022. 

It is the first time Anisimova has won from match point down since the 2019 Mallorca Open and the youngster was lost for words in her on-court interview.

"I'm speechless. I absolutely love playing in front of you guys [the crowd] in Melbourne. It's honestly so much fun. I can't stop smiling," she said.

"I knew I had to be playing sharp if I wanted to give myself a chance, Naomi is always going to be playing well and she's an absolute champion. 

"I knew I had to step up my game and try to be aggressive, I think that's what I started doing in the second set.

"I'm so grateful I was able to play well and get this win, it means a lot. Stepping on to the court, all I'm thinking is having fun. Every day here is an amazing opportunity."

Ash Barty insisted she had no expectations Naomi Osaka would be her fourth-round opponent at the Australian Open after the Japanese star's surprise loss.

Barty and Osaka were on track to meet in the last 16 in Melbourne before the latter suffered a three-set loss to Amanda Anisimova on Friday.

World number one Barty, who crushed Camila Giorgi 6-2 6-3, always felt there were no certainties despite all the talk about a potential clash against Osaka.

"That was your expectation. My expectation was whoever it would be. I mean, each match is uncertain," she said.

"Each match of tennis, there are no certainties. You have no idea what's going to happen. You just have to navigate your way through as best you can that given moment.

"I have done a good job of that this week. Now it's exciting to get to play Amanda again. We've played before. It will be nice to play each other again in a big match."

Barty and Anisimova will meet for the first time since their 2019 French Open semi-final, which the former won on her way to a maiden grand slam title.

That match was a "turning point" in Barty's career. After losing the first set despite leading 5-1, Barty fell 3-0 behind in the second, only to fight back for a 6-7 (4-7) 6-3 6-3 victory.

"I try to forget, but also, I remember that I learned a lot from that moment," Barty said.

"That was a turning point in my career, and you have to be able to take learnings from those moments, as hard as they are sometimes, and I was able to navigate and find a way through.

"At that point in my life, in my career, it was a massive turning point.

"Obviously it feels like it's a lifetime ago, but some of those memories are still really vivid. Without a doubt we will take that and use that experience, use those feelings and those emotions as best we can come Sunday."