Louis Rees-Zammit's excellent second try gave Wales a narrow 25-24 bonus-point victory over 14-man Scotland in the Six Nations.

After claiming a first win at Twickenham in 38 years by beating England 11-6 on the opening weekend, Scotland stormed ahead with tries from Darcy Graham and Stuart Hogg on Saturday.

Rees-Zammit went over before half-time and set up Liam Williams to haul Wales back into the game, and they took the lead when Wyn Jones touched down after Zander Fagerson saw red.

Hogg put Scotland back in front despite their numerical disadvantage but a stunning solo effort from Rees-Zammit saw Wales follow up their win over 14-man Ireland last week with another success.

Scotland only conceded six penalties against England but had half that amount inside six minutes, with Leigh Halfpenny splitting the posts after the third.

Finn Russell restored parity and added the extras after Ali Price chipped the ball over the Wales defence for Darcy Graham to dot down in the 18th minute.

The hosts increased their advantage when Halfpenny spilled Hogg's kick over the top and the Scotland full-back took it over the line, but Rees-Zammit reduced the arrears before half-time.

Halfpenny sat out the second half due to a failed HIA and, after Gary Graham had a try ruled out for obstruction, Williams went over in the left corner.

Scotland were reduced to 14 men when Fagerson was dismissed for catching Jones on the head at the breakdown, and the Wales prop made them pay by scoring a third try.

The hosts responded with a sustained spell of pressure in front of the posts that culminated in Hogg evading Owen Watkin and Nick Tompkins to cross.

However, Rees-Zammit showed incredible pace to chase down his own kick and score the decisive points with 10 minutes remaining.

England are back to being themselves after recovering from last week's defeat to Scotland with a 41-18 victory over Italy on Saturday, according to captain Owen Farrell.

The reigning champions ran in six tries to claim a bonus-point victory at Twickenham, a week on from losing 11-6 to Calcutta Cup rivals Scotland.

Monty Ioane put Italy ahead early on but Jonny Hill gave England lift-off with their opening try and Anthony Watson crossed over either side of Jonny May's 32nd Test try.

Jack Willis touched down on his debut and, though Tommaso Allan added a second for Italy, it was plain sailing for the home side as Elliot Daly ran through down the left.

And while accepting England were far from their best against Italy, Farrell was pleased with the way they responded to their opening loss.

"We're back to being 'us' there," he told ITV. "It wasn't a perfect performance, not the best we've ever had, but in terms of the feeling, the energy and the intent, that felt back to 'us'..

"We had some honest conversations with ourselves during the week... there was excitement to get on the training field and put things right. 

"And the way that we built up showed in the way that we played. I thought we attacked the game. 

"Obviously they had an advantage to move the ball and they ended up scoring a try, which was probably a bit over over-eagerness from us

"But after that I thought our intent was brilliant. We got in behind them, probably not everything went our way, but we stuck at it and the game ended up going our way."

England have now won each of their 22 Six Nations fixtures against Italy, who have lost their last 29 matches in the competition in a run stretching back to February 2015.

The Azzurri offered promising glimpses, not least with their second-quickest ever Six Nations try through Ioane, but England ultimately proved too strong on home soil.

"Credit to Italy, they were tough, they never gave up, and we knew they were going to do that," said England prop Kyle Sinckler. 

"Up front they were strong, their forwards carried hard, their backs had good energy... it was a tough, tough test match but our boys got stuck in there and got the win."

Echoing the thoughts of skipper Farrell, Sinckler hailed England's response to last week's rare home loss.

"I think it was a step in right direction. I think our intent was a lot better today, especially up front," he said. 

"We probably didn't get the rewards we wanted, but in terms of the intent, and showing how much it means to us to play for our country, I think it was a step in the right direction.

"We were obviously very frustrated with the performance last week, and we knew we had to step up and play the England way, and the way we want to dominate up front. 

"We did that at times today, but we know there's so much more to give. But like I said, it was a step in the right direction. The game's done, we move on to the next one."

Next up for England is a showdown with Wales at the Principality Stadium on February 27.

Rafael Nadal was able to offer a positive update on his fitness after easing into the second week at the Australian Open.

The 20-time grand slam champion is playing in his first tournament since November's ATP Finals and faced a battle to make the Melbourne major due to a back problem.

But Nadal has made the fourth round without dropping a set, seeing off Cameron Norrie 7-5 6-2 7-5 on Saturday.

"I did things well, [then there are] things that I need to improve. Something normal," the Spaniard said. "But, yes, happy, of course. Second week, straight sets. Can't complain."
 

PAIN RELIEF AT LAST FOR RAFA

Nadal might have been similarly dominant in his prior matches but revealed after beating Norrie he is only now feeling fitter.

"No, the back was not getting better each day; it was getting better today," he said. "But today is better, yeah, the first day I feel an improvement, and that's the most important thing for me today, more than any other thing.

"Of course, I was not serving my normal serve for the last 15 days. Today is the first day that I started to serve again my normal serve.

"But yesterday I didn't practice, so today was just warming up with the new, normal movement.

"So, of course, I didn't serve bad, but I can do better, I think. And I'm looking forward to doing it better. It has been an important victory for me.

"The biggest victory is the back is better for the first day. That's the most important thing."

Nadal will face Fabio Fognini next after he ended Australia's interest in the home grand slam with a 6-4 6-3 6-4 victory over Alex De Minaur, the host nation's final hope.

"It's one of those matches," an impressed De Minaur said. "You're out there leaving it all out there, but you can just feel that he's playing at another level."
 

MOODY MEDVEDEV MAKES AMENDS

There are three Russian men in the last 16 for the first time in Melbourne in the Open Era, but the country's biggest name survived a major scare.

Daniil Medvedev was cruising after taking the first two sets against Filip Krajinovic, only to drop the next two and engage in an angry back-and-forth with coach Gilles Cervara.

Cervara eventually left Medvedev's box as the fourth seed trailed 4-1 in the fourth set and did not return, but the 25-year-old recovered to get the job done in dominant fashion, a 6-3 6-3 4-6 3-6 6-0 victor.

Medvedev, with Mackenzie McDonald next, said of the incident with Cervara: "He said just before leaving that he's sure I'm going to win the match, but he's going to leave to let me be more calm.

"Sometimes maybe I will disagree but this time for sure it was a good thing to do.

"Today it helped, and definitely we're going to talk about it a little bit, but there is not a big deal."

Andrey Rublev joined Medvedev and compatriot Aslan Karatsev in the fourth round as he improved to 7-0 for the year with a three-set defeat of Feliciano Lopez. He will play Casper Ruud.
 

HISTORY CHANNEL OVER CHAMP

Defending champion Novak Djokovic's struggles with injury on Friday might have intrigued much of the tennis public, but Stefanos Tsitsipas was not overly concerned.

The fifth seed, who breezed past Mikael Ymer, did not watch the match and revealed he has little interest in keeping up with the exploits of his rivals.

"I might watch [Djokovic and Nadal] a little bit on TV if it happens that the TV is on or the right channel is on," he said. "Otherwise I just switch to History Channel.

"Definitely not tennis history. I think I have enough of tennis being in here every single day."

Tsitsipas will next play Matteo Berrettini, who is enjoying his best run at the Australian Open and saw off a side complaint to advance in three sets by edging Karen Khachanov, another Russian, in a trio of tie-breakers.

Ash Barty may have her focus on winning the Australian Open right now but suggested a career change could be on the cards in the future.  

The world number one made sure she will still be competing during the second week of the tournament in Melbourne by beating Ekaterina Alexandrova in straight sets.  

But, having played international cricket for Australia before switching to tennis, could the multi-talented Barty be considering trying another sport?  

Elsewhere in Saturday's action, Karolina Pliskova lost her cool – and also a couple of rackets – as she slipped to defeat against the impressive Karolina Muchova in an empty Rod Laver Arena, with fans not able to be present due to a five-day lockdown in the state of Victoria.

Elina Svitolina had no such problems in her third-round match, while Elise Mertens was victorious in just over an hour against Belinda Bencic. Jennifer Brady ended Slovenian qualifier Kaja Juvan's run in the first grand slam of the year.

AUSSIE RULES, OK? 

After winning 6-2 6-4 without ever needing to be at her peak, Barty was cheekily asked by former doubles partner Casey Dellacqua – now working in the media – whether she may be set to switch paths again, once her tennis career has come to an end.  

Australian rules football was the answer – but Dellacqua maybe got more than she bargained for from her former playing partner during the on-court interview. 

"I thought it was our deal, we're going to AFLW. It's ABCD [the nickname for the pairing from their doubles career]. We come as a package, and I know we will be going to the [Richmond] Tigers that is for sure," Barty said. "You can't go to Carlton. You have to come to the 'Tiges' with me."

Dellacqua replied: "I need to get out there and start practicing some kicking, but you are good. I would love to do that one day." 

For Barty, though, the next challenge facing her is Shelby Rogers, who knocked out 21st seed Anett Kontaveit during the evening session.  

MAKING A RACKET 

A disgruntled Pliskova was not impressed when punished for smashing up a racket during her match with compatriot Muchova. 

Having received a warning when throwing a racket to the floor during the course of the final game in the opening set, the sixth seed then vented her frustration again on another while in the players' tunnel.  

An official witnessed the incident and reported it to chair umpire Alison Hughes, who punished the Czech with a point penalty before she began serving to open the second set.  

"It's off court, I'm allowed to do what I want," Pliskova insisted when querying the decision to the official. She would go on to hold before recording two successive breaks, yet somehow failed to force a decider.  

Muchova rallied from 5-0 down in sensational fashion, winning seven games on the spin to triumph 7-5 7-5 to make it through to the last 16.

CONTRASTING PROGRESS FOR SEEDS

Svitolina has still yet to drop a set in the tournament after overcoming 26th seed Yulia Putintseva by a 6-4 6-0 scoreline.  

The fifth seed was twice down a break in the first set but, after eventually coming out on top to take a 1-0 lead, breezed through the second in a hurry.  

"She has a very different game style from what I played my last two rounds, so it wasn't easy at the beginning to adjust," Svitolina said. "As soon as I was feeling better, I just stepped my game, and it was quite a comfortable win after." 

Next up will be Jessica Pegula, who is through to the fourth round at a slam for the first time in her career after thrashing Kristina Mladenovic 6-2 6-1.  

There was also success for another American in the main draw, Brady defeating Juvan in straight sets. Her reward is a clash with Donna Vekic, the 28th seed having to save a match point before eventually seeing off Kaia Kanepi 5-7 7-6 (7-2) 6-4 after two hours and 38 minutes on court. 

Rafael Nadal rounded off a comfortable first week at the Australian Open with a straight-sets win over Cameron Norrie to reach the last 16.

The Spaniard triumphed 7-5 6-2 7-5 in two hours and 14 minutes on Rod Laver Arena on Saturday.

Nadal was short of his brilliant best but a third-round victory never looked in doubt from the moment he emerged triumphant from a competitive opening set.

He will face number 16 seed Fabio Fognini, who defeated home favourite Alex de Minaur, in the fourth round.

The world number two will fancy his chances of a first Australian Open title since 2009, especially with defending champion Novak Djokovic struggling with an injury.

Nadal is yet to drop a set or even be taken to a tie-break at the tournament but he almost was by Norrie in the first meeting between the players.

World number 69 Norrie claimed the first break of the match in the fifth game when Nadal found the net with a forehand.

But the 20-time grand slam champion immediately broke back and then pivotally struck again while Norrie was serving to stay in the set at 6-5.

Norrie was unable to force a break point in the match, with Nadal racing clear to break twice and secure the second set.

The Briton saved two break points early in the third set but that was only delaying the inevitable.

It again looked like Norrie would force a tie-break, but once more Nadal struck when it mattered at 6-5, a forehand winner setting up match point that was converted when his opponent sent a backhand wide.

Data Slam: Nadal punishes Norrie second serve

Norrie won only seven of 30 points on his second serve, his 23 per cent win rate falling well short of Nadal in that category (18/26, 69 per cent). The match was competitive apart from the second set, where four winners and 14 unforced errors from Norrie meant Nadal did not need to do much to go two ahead and put the result beyond doubt.

WINNERS/UNFORCED ERRORS
Norrie– 25/43
Nadal– 33/35

ACES/DOUBLE FAULTS
Norrie– 9/4
Nadal– 7/1

BREAK POINTS WON
Norrie– 1/1
Nadal– 5/12

James Harden has apologised for the "drama" surrounding his exit from the Houston Rockets and wishes his trade to the Brookyln Nets could have been a smoother process.

Former NBA MVP Harden was moved to the Nets one month ago after playing more than eight seasons with Houston.

He joined Kevin Durant and Kyrie Irving in a star-studded roster, having played eight games early in the season with the Rockets.

Harden's desire to seek a trade had been public knowledge since the offseason but a drawn-out process followed until the 31-year-old was traded after a 17-point loss to the Los Angeles Lakers.

After that game Harden called the situation "crazy" and "something that I don't think can be fixed".

Harden was happy the Rockets ultimately granted his wish to move to Brooklyn, but regrets the acrimonious nature of his departure.

"Apologise for how it went down, but I guess I had to do what I had to do in order to get to where I wanted to go," Harden said to ESPN.

"And credit to Houston, they didn't necessarily have to trade me to Brooklyn. They could have traded me anywhere, but those are some stand-up guys over there. 

"And it ended up the right way, but just didn't like how that month or two played out."

Harden insists the circumstances of the weeks leading up to his Rockets exit did not provide a fair reflection of his character.

He added: "I don't like it at all because that's not who I am. The drama, the extra whatever you want to call it, the negativity for me. 

"I don't really like negative energy. That's draining. So I don't like how it necessarily happened.

"The front office knew where I stood and what I wanted. I feel like it could have happened a lot smoother, a lot easier, but it is what it is."

The Nets are 15-12, third in the Eastern Conference, ahead of Saturday's big game at the Golden State Warriors (14-12).

Harden leads the league with 11.0 assists per game in 2020-21, though his scoring average sits at 23.9 points, lower than what he recorded in any of his full seasons with the Rockets.

Ash Barty battled back to win both sets against Ekaterina Alexandrova and book a place in the fourth round of the Australian Open. 

The world number one triumphed 6-2 6-4 after one hour and 21 minutes on court, though there was no crowd present to cheer on the home favourite due to the five-day lockdown in place in Victoria. 

Barty admitted that, with fans having been allowed into Melbourne Park earlier in the tournament, there was a different – if not completely unpleasant – atmosphere to proceedings in the evening session on Margaret Court Arena.

"It's very strange, it changes the sound of the court a little bit," the Australian – who played with her left thigh heavily strapped having pulled out of doubles duty on Friday – said during her on-court interview.

"I love the crowd, but I love the sound the ball makes. It feels a bit like practice."

Barty lost her opening service game as she quickly fell 2-0 behind at the start of the contest, though she hit back impressively to take the opener against the 29th seed.

The 2019 French Open champion claimed six successive games, hitting just five winners as the policy of keeping the ball in play paid off thanks to 16 unforced errors from her opponent. 

Alexandrova was more consistent in the second set, leading to a break of serve that she quickly consolidated to make the score 4-2. 

However, the Russian was unable to cling on to her advantage and, when serving to stay in the match, let slip two opportunities to extend proceedings. Barty will next face Shelby Rogers, who knocked out 21st seed Anett Kontaveit in straight sets.

Giannis Antetokounmpo was full of admiration for the Utah Jazz after his Milwaukee Bucks were on the end of a 129-115 loss to the Western Conference leaders. 

The Jazz improved to 21-5 as four players racked up 25 points or more for the first time in franchise history, with Rudy Gobert (27 points), Joe Ingles (27), Donovan Mitchell (26) and Jordan Clarkson (25) all hitting the mark. 

It represents a sixth win on the bounce for the impressive Jazz, whose 26-game record is the best in their history. 

For his part, Antetokounmpo contributed 29 points and 15 rebounds, but Milwaukee (16-10) slipped to back-to-back defeats. 

However, the 26-year-old insisted there was no shame in losing to the best team in the Western Conference, showering his opponents with praise in the process.

"It's okay, it's nothing to be upset about. It will be hard, especially when you play the best team in the West," Antetokounmpo said. 

"They're moving the ball, they're fighting, they play for one another, they know their role. 

"Whatever they do, they are doing it hard. 

"It just looks fun. Like when I watch them play, it looks fun, it looks easy, it looks simple. 

"For sure, they look like us last year, and man, when you're at that point and you're playing with that confidence, you're hard to beat for sure."

Kevin Durant will make a long-awaited return to the Bay Area on Saturday as the Brooklyn Nets visit the Golden State Warriors in a mouth-watering NBA clash at Chase Center.

It is a game that pits the league's newest 'big three' (Durant, Kyrie Irving and James Harden) against a Warriors team led by Stephen Curry, whose incredible performances this season merit MVP votes.

But more significantly it is Durant's first road game against the Warriors since leaving them to join the Nets after the 2018-19 season that ended with Golden State losing the NBA Finals to the Toronto Raptors in a series that saw the 2014 MVP suffer an Achilles injury.

Having missed the last three games because of coronavirus contact tracing protocols, Durant has been cleared and will face the team with whom he won two NBA titles and two Finals MVPs, though Curry does not expect his former team-mate to treat the contest any differently.

Reflecting on Durant's time with the Warriors, Curry told a media conference: "Two championships, an unfortunate ending with injuries and not getting it done in the 2019 Finals, but it was some of the best basketball the world has ever seen.

"The ability to put that much talent and experience together and make it work, there was no guarantee it was going to work, and we figured it out and it was an amazing run."

Asked about the emotions of his return, Curry added: "Honestly, I don't know how special it'll be because it's not at Oracle [Arena] and there's no fans, so it's kind of weird that whole vibe.

"We've got a tribute video which he deserves, and hopefully it'll be a moment that he'll appreciate. But outside of that it is kind of weird to be honest, in terms of all the things that have changed since 18-19.

"If you ask him how he feels he'll probably say it's another game and I'm sure that's how it will be once the ball drops on Saturday."

TOP PERFORMERS

Stephen Curry - Golden State Warriors

Curry has bounced back from a 2019-20 season lost to injury in utterly remarkable form.

He is averaging 30 points a game, the only other season in which he has done so was in 2015-16, when he was named the league MVP in a unanimous vote.

Curry is shooting 43.5 per cent from beyond the arc, having made 10 threes in Thursday's win over the Orlando Magic, which he finished with 40 points.

That his tally against the Magic was not close to his season-high is indicative of the level at which he is playing.

The six-time All-Star has a 62-point game and a 57-point game this season, and has topped 30 points on 10 other occasions. Curry is back, and he's back to his best.

James Harden - Brooklyn Nets

Harden may not be scoring at the same level as Curry but his impact this season is undoubted.

The former Houston Rockets star is sixth in the NBA in PAR (Points + Assists + Rebounds) per game with 41.8, so far justifying the Nets' blockbuster trade for his services.

He started the month with his fourth triple-double of the season against the Los Angeles Clippers and has four successive double-doubles since.

Whether it's as a scorer, facilitator or rebounder, the Warriors will have to do all they can to limit Harden's influence.

KEY BATTLE: CAN DRAYMOND STOP DURANT?

With the Warriors still without rookie center James Wiseman because of a wrist injury and DeAndre Jordan out for the Nets, Durant may have to matchup with Draymond Green at center.

In the absence of Wiseman, the Warriors have had to turn to small ball and play Green at the five, and his clash with Durant promises to be a feisty one, given they weren't afraid to get in each other's faces as team-mates.

One of Green's tasks will be to stop Durant from getting into the paint consistently. That is no easy feat, but the Warriors have had success stopping teams in that regard this season.

Their 43.5 points in the paint allowed per game are the sixth-fewest in the NBA. If Green and the Warriors can limit Durant's opportunities to get to the hoop, they will have a much better shot of pulling off the upset.

HEAD TO HEAD

Durant and Irving inspired the Nets to a blowout win over the Warriors to start the new season.

The Nets emerged 125-99 victors, Durant scoring 22 points and leading Brooklyn with a plus-minus rating of plus 26.

That game was illustrative of the massive changes both teams have undergone. It was Brooklyn's second successive win over the Warriors but they had lost their previous eight meetings with one of most dominant teams in NBA history.

The Utah Jazz continued their impressive NBA run with a win over the Milwaukee Bucks, while the Los Angeles Lakers extended their own streak.

The Western Conference-leading Jazz improved to 21-5 courtesy of a 129-115 victory over the Bucks on Friday.

Rudy Gobert (27 points), Joe Ingles (27), Donovan Mitchell (26) and Jordan Clarkson (25) all had 25-plus points for Utah, who have won six straight games.

Gobert also pulled down 12 rebounds in his double-double, while Ingles went seven-of-nine from three-point range, with the Jazz's 21-5 start their best 26-game record in franchise history.

Giannis Antetokounmpo starred for the Bucks with 29 points and 15 rebounds, but Milwaukee (16-10) slipped to back-to-back defeats.

The Lakers extended their winning streak to seven with a 115-105 win over the Memphis Grizzlies.

Anthony Davis (35 points and nine rebounds) and LeBron James (28 points, nine rebounds and eight assists) again led the way for the Lakers (21-6).

Mavs win fourth straight as Rozier shines for Hornets

The Dallas Mavericks won a fourth straight game with a 143-130 victory over the New Orleans Pelicans. Luka Doncic had a double-double of 46 points and 12 assists, while Kristaps Porzingis poured in 36 points. It marked the first time in NBA history a pair of foreign-born team-mates each had 35-plus points in a game, as per Stats Perform. Zion Williamson had 36 points for the Pelicans.

Terry Rozier's 41 points lifted the Charlotte Hornets past the Minnesota Timberwolves 120-114.

Kawhi Leonard posted 33 points as the Los Angeles Clippers improved to 19-8 with a 125-106 success over the Chicago Bulls.

Saddiq Bey had a double-double of 30 points and 12 rebounds in the Detroit Pistons' surprise 108-102 win against the Boston Celtics. He was the first Pistons rookie with 30-plus points and 10-plus rebounds since Grant Hill in 1995.

Misery for Wizards

The Washington Wizards dropped a second straight game, beaten by the New York Knicks 109-91. The Wizards shot at just 38.2 per cent from the field.

Porzingis in form

Porzingis went eight-of-13 from three-point range in the Mavericks' win, including hitting one from the logo.

Friday's results

Charlotte Hornets 120-114 Minnesota Timberwolves
New York Knicks 109-91 Washington Wizards
San Antonio Spurs 125-114 Atlanta Hawks
Dallas Mavericks 143-130 New Orleans Pelicans
Los Angeles Clippers 125-106 Chicago Bulls
Detroit Pistons 108-102 Boston Celtics
Denver Nuggets 97-95 Oklahoma City Thunder
Utah Jazz 129-115 Milwaukee Bucks
Los Angeles Lakers 115-105 Memphis Grizzlies
Portland Trail Blazers 129-110 Cleveland Cavaliers
Orlando Magic 123-112 Sacramento Kings

76ers at Suns

The Philadelphia 76ers (18-8) take on a Phoenix Suns (15-9) team riding a four-game winning streak on Saturday.

Rick Carlisle praised Luka Doncic and Kristaps Porzingis' "tremendous" chemistry after the Dallas Mavericks won a fourth straight game.

Doncic (46 points, 12 assists and eight rebounds) and Porzingis (36 points and seven rebounds) led the Mavericks past the New Orleans Pelicans 143-130 on Friday.

It marked the first time in NBA history a pair of foreign-born team-mates each had 35-plus points in a game, as per Stats Perform.

Carlisle hailed the pair after the Mavericks improved to 13-14 to sit 11th in the Western Conference.

"They're both great offensive players, they're both very unique, they fit together extremely well, their games complement one another extremely well," the Mavericks head coach told a news conference.

"The chemistry was tremendous. Balls were being delivered on time, on target, people stepping into shots in rhythm. It was great stuff to watch."

Despite their win, the Mavericks gave up 130 points to Zion Williamson (36) and the Pelicans.

While Carlisle knows what his offense is capable of, he is eager to see the defense improve.

"This is why I keep talking about defense and I know some of our guys are talking about defense. This kind of shot-making is great, is it always sustainable? Of course not. Not every team can keep up this kind of pace, but we'll certainly try.

"This is the reason you've got to have a defense that'll hold up on nights maybe when you don't have it going quite like this. With the way we can space the floor, the way we can penetrate the ball, the way we can shoot the ball, all those kinds of things, we're going to create our share of problems for teams with our offense.

"We've just got to keep working on the basics – transition, protecting the rim, closing out, contesting and rebounding, those are the main things."

Elina Svitolina said playing behind closed doors at the Australian Open felt "a bit disturbing" after having fans in attendance earlier in the week.

The Ukrainian fifth seed booked her spot in the fourth round in Melbourne with a 6-4 6-0 victory over Yulia Putintseva on Saturday.

But no fans were in attendance on Margaret Court Arena as Victoria started a five-day lockdown due to coronavirus.

Svitolina, who will face Jessica Pegula in the last 16, said she felt the difference.

"It was very different conditions. I played a night match at 7:00 with a good crowd. Now it was completely different. It was for sure a bit disturbing, I would say, in some ways sad," she told a news conference.

"But it is what it is. I had to accept. I had to have a good mindset, not thinking too much about that. I just tried to focus on my game."

Svitolina reached the fourth round in Melbourne for the third time in four years after mixing 18 winners with 20 unforced errors.

But the 26-year-old said the lack of fans meant the third-round encounter felt like a practice match.

"It feels like that. I actually had few thoughts about it today. It feels like this. I tried to convince myself that it's a grand slam and that we are playing an important match. I have to focus on my match," Svitolina said.

"But for sure there's some thoughts and there is I say some low moments that can sneak into the mind. It's what we have to deal with. I'm trying my best to do it."

Novak Djokovic insists there is a real danger he may withdraw from the Australian Open, with an ultrasound on an abdominal injury planned for Saturday.

The eight-time champion at Melbourne Park pulled off a dramatic five-set win over American Taylor Fritz to reach round four, but it came at what could prove a high cost.

After battling through two tight sets to forge ahead in the match, Djokovic was jolted early in the third by a sudden "tear", as he put it.

Although painkillers allowed him to continue and fend off a Fritz comeback, the world number one might be advised by doctors that his race in Australia is run for this year.

He is due to face Milos Raonic on Sunday in round four, and the Canadian is a player that Djokovic holds an 11-0 winning career record against. This time Raonic could be gifted a walkover.

Explaining the injury blow, and what comes next, Djokovic said: "Everything was working fine for me, and then beginning of the third set I made this quick move on the return going to the forehand, rotating there, and I just felt a tear, I felt something happen.

"Went out for medical timeout when I was tested, evaluated. I have huge pain, I took the highest dose of anti-inflammatories possible.

"It did kick in end of fourth, beginning of the fifth when I actually started to move and I could actually start to rally with him from back of the court.

"Until that moment, it was only serve for me and kind of hoping and praying that I'm going to get an easy ball after my serve so I could just go for it. That's what I've done.

"I honestly don't know how I won this match. I'm very proud, at the same time sad and worried, because it's definitely something serious happening with my injury.

"I don't have much time to recover for the next match. Definitely not training tomorrow [Saturday]."

The 33-year-old Serbian would not want to risk worsening the problem, given he has plenty to play for over the rest of the year.

However, he is chasing grand slam success wherever he can get it, given he trails Roger Federer and Rafael Nadal by three on the all-time list.

Djokovic's disqualification for hitting a ball that struck a line judge at the US Open last year was followed by defeat to Nadal in the French Open final, and now his luck may be out again.

Once the tests take place on Saturday, there should be a greater sense of clarity in Djokovic's mind.

Setting the scene for what should have been a relaxed day of practice but is now a crucial day in his championship, Djokovic stressed he hoped to be able to continue.

He said of his Saturday plan: "I'm coming here to evaluate more with the doctor and medical team, and do some ultrasound and understand what's really going on so that the doctor and medical team can prescribe best possible treatment and the only possible treatment that I could even have the slightest chance to go out in less than 48 hours."