Sofia Kenin's title defence came to a shock end in the second round of the Australian Open, where world number one Ash Barty advanced amid injury concerns.

Kenin was looking to become the first woman to defend her crown at Melbourne Park since Victoria Azarenka in 2013, instead, she was a high-profile casualty in warm conditions on Thursday.

Barty, who lost to Kenin in last year's semi-finals in Melbourne, stayed alive with a straight-sets win over fellow Australian Daria Gavrilova.

Former world number one Karolina Pliskova also progressed beyond the second round as fifth seed Elina Svitolina blitzed American sensation Coco Gauff.

KENIN OUSTED IN BOILOVER

The American star arrived at the year's first grand slam with high expectations and looking to become the first woman to go back-to-back at a major since Serena Williams in 2016.

But fourth seed Kenin fell to experienced Estonian Kaia Kanepi 6-3 6-2, having tallied 10 winners and 22 unforced errors in windy conditions in Melbourne - the scene of her breakthrough slam more than 12 months ago.

It was Kenin's first defeat to a player ranked outside the top 50 since going down to then-number 54 Iga Swiatek in the 2020 French Open final.

Asked why she was nervous pre-match, Kenin told reporters: "It's like the outside pressure. I felt really nervous. I haven't felt my game for, I don't know how long, but I haven't really felt my game so well, even in my first round. 

"I played well, but still haven't felt 100 per cent game-wise. It's obviously tough."

STRAPPED THIGH? NO WORRIES FOR BARTY​

Barty's left thigh was heavily strapped amid concerns but the 2019 French Open champion still booked her spot in the third round with a 6-1 7-6 (9-7) win over countrywoman Gavrilova.

The first Australian woman to reach the semi-finals in Melbourne since 1984, following last year's run, Barty gave up a 5-2 lead in the second set before saving two set points in the tie-break.

Reflecting on Kenin's surprise exit, Barty talked up the standard of the WTA Tour.

"There are no easy matches," said Barty, who next meets 29th seed Ekaterina Alexandrova for a spot in the round of 16. "There are no easy matches in any tour event, any slam, anything. I think every time you walk on the court, you have to try and be able to bring your best tennis to be able to compete with everyone. 

"That's just the level that there is now on the women's side. That's something really exciting about women's tennis now, is that every single match, it's a fair match. You go out there, you play hard, you try to do the best that you can."

PLISKOVA AVENGES LOSS, SVITOLINA TOO GOOD FOR GAUFF

Beaten by Danielle Collins in the third round of the Yarra Valley Classic just eight days ago, sixth seed Pliskova got the better of the 2019 Australian Open semi-finalist this time around.

Pliskova - also a semi-finalist at Melbourne Park two years ago - defeated Collins 7-5 6-2 and next plays 25th seed Karolina Muchova.

"I just played better in some moments, which I didn't last week. Then she was not playing that well as she did last week," Czech star Pliskova said. "I knew if I at least maintain little bit, just play at least similar as I was playing last week, I knew it's going to be difficult for her to repeat what she played last week. I think she really played great."

Owning a 6-1 record in the second round at Melbourne Park - falling only at this stage in 2016 - Svitolina produced a mature performance to conquer 16-year-old star Gauff 6-4 6-3 on centre court as 26th seed Yulia Putintseva awaits. 

Elsewhere, seeds Belinda Bencic, Elise Mertens, Anett Kontaveit, Jennifer Brady and Donna Vekic moved through.

Nick Kyrgios has the weapons to overcome the "super physical" Dominic Thiem at the Australian Open on Friday.

The eccentric Australian continued to excite at Melbourne Park with a five-set win over Ugo Humbert in the second round, saving two match points.

Kyrgios, 25, is into the third round of a grand slam for the 15th time in his career, but it has been a difficult hurdle for him to cross. He is 6-8 in the third round of majors, although three of those wins – and just one loss – have come at the Australian Open.

While he has all the weapons, Kyrgios faces third seed Thiem, the US Open champion and last year's runner-up in Melbourne.

"He's probably one of the most physical guys on tour. He's an extremely good player. I have actually seen him progress. He's a bit older than I am. I actually saw him in juniors and then I saw him struggle for a couple years, futures, challies, and then to see him get to the top of the game. It's been actually pretty cool to see him develop and finally find what he needs to do to win matches," Kyrgios said about Thiem after overcoming Humbert.

"He trains like an absolute animal. He's consistent every day. And I actually have a lot of respect for him. I think his style of tennis is not easy to play. He's super physical, but I'm not even thinking about it. Like, I'm just hurting thinking about playing him right now."

He added: "Whatever happens against Thiem happens. I'm going to go out there, serve, play with instinct, and if it's enough, it's enough. If it isn't, I'm all right with that."

With much of the talk at the year's first major focused on the fast courts, Kyrgios' serve will be vital.

The Australian has seen 50 per cent of his first serves in the opening two rounds go unreturned, with 44 aces. He has also served at 72 per cent and won 81 per cent of the points when his first serve has gone in.

Thiem has recorded wins over Mikhail Kukushkin and Dominik Koepfer to begin the tournament, winning 13 of 27 return games. Kyrgios has won eight of 42 return games.

Kyrgios has been among the men more willing to serve and volley to begin the event, playing 26 such points and winning 16. He has also won 39 of 55 net points, while Thiem is an impressive 31 of 36.

Novak Djokovic is among those who have talked about the fast courts at Melbourne Park this year, and the world number one said that would suit the big servers. Thiem said he had never played on courts as fast at a grand slam so far in his career.

"I prefer last year's courts, if I could choose. It's pretty fast, as I said the days before. It's probably one of the fastest grand slam tournaments I've played so far," he said. "Well, we have to get used to it, yes. But if I have to choose, I would choose the last year's condition."

The opportunity is there for the big-hitting Kyrgios, but he will need to be at his best.

A teary Sofia Kenin admitted she was unable to handle the pressure of defending her Australian Open title after a second-round exit.

The American fourth seed departed at Melbourne Park on Thursday, when she was beaten by Kaia Kanepi 6-3 6-2.

Victoria Azarenka was the last woman to defend the Australian Open crown in 2013, while Serena Williams was the most recent to go back-to-back at any major, winning Wimbledon in 2015 and 2016.

Kenin, 22, said she struggled to cope with the pressure of defending a grand slam title for the first time.

"Obviously I haven't experienced that. I obviously felt like I'm not there 100 per cent physically, mentally, my game. Everything just feels real off obviously. It's not good," she told a news conference.

"I know I couldn't really handle the pressure. I'm not obviously used to this, so right now I just got to figure out how to play at that level that I played at.

"Because like today and those matches, it just hasn't been there. It's weird. I've been practising for two weeks. Luckily I've been able to practice. I felt fine in practice. Just couldn't do that in the game."

Kenin had 22 unforced errors against Kanepi, while she failed to convert any of her seven break points.

After a second loss in as many meetings with Kanepi, Kenin gave credit to the 35-year-old Estonian.

"She obviously played well. I obviously felt like I couldn't find my rhythm.  I was obviously way too nervous," she said.

"Yeah, I mean, she played really well. She came up with some good shots. She obviously had a good plan against me. I just couldn't execute my shots."

Ash Barty insisted her leg issue was not impacting her at all after reaching the Australian Open third round.

The world number one overcame Australian compatriot Daria Gavrilova 6-1 7-6 (9-7) on a warm and windy Rod Laver Arena on Thursday.

But Barty's left thigh was heavily strapped and she gave up a 5-2 lead in the second set before saving two set points in the tie-break.

However, the 2019 French Open champion played down the severity of the issue.

"The bandage is very big, but that's more just support so that the tape itself doesn't fall off. It's not a very subtle tape job, you often see it on a lot of the girls," Barty told a news conference.

"The guys can hide it beneath their shorts a little bit better. Just a little bit of support. I played a lot of matches in the last 10 days after not playing for 12 months, which is natural.  It's more of an assistance than anything else."

Barty added: "It came on early Tuesday, warming up for the match. But, yeah, obviously it's not affecting the way that I can play in any way.

"It's just more giving the leg some assistance to make sure it doesn't get to a point where it's going to affect me."

Barty will face Ekaterina Alexandrova in the third round.

Sofia Kenin's Australian Open title defence came to an end with a second-round loss to Kaia Kanepi on Thursday.

Kenin, who won her first and only grand slam title in Melbourne last year, fell to Kanepi 6-3 6-2 on a warm and windy day.

The American fourth seed had lost her only previous meeting against Kanepi and was again no match for the 35-year-old Estonian.

Kenin's second-round loss marked her earliest exit at a grand slam since Wimbledon in 2019.

She finished with 10 winners and 22 unforced errors, while Kanepi was far steadier with 22 and 17 respectively.

It continued a tough run for defending champions in Melbourne, where Victoria Azarenka was the last woman to go back-to-back in 2012 and 2013.

The last woman to defend any major crown was Serena Williams at Wimbledon in 2016.

Kanepi moved into the third round of a major for the first time since the 2019 French Open.

She will next face Croatian 28th seed Donna Vekic.

Novak Djokovic admitted there was plenty of room for improvement after coming through a "difficult spot" at the Australian Open, where Nick Kyrgios thrilled the crowd with an impressive comeback.

Top seed Djokovic was made to work for his 6-3 6-7 (7-3) 7-6 (7-2) 6-3 triumph against Frances Tiafoe as he reached the third round in Melbourne. 

Kyrgios is also through, albeit he even surprised himself by rallying from the brink of defeat to knock out 29th seed Ugo Humbert in the evening session. 

Stan Wawrinka was on the wrong of an upset on Wednesday, but there were no such problems for fellow seeds Dominic Thiem, Alexander Zverev, Diego Schwartzman and Milos Raonic. 

Meanwhile, Denis Shapovalov and Felix Auger-Aliassime will have to put their friendship to one side when they face each other next, the former setting up the all-Canadian clash by beating Bernard Tomic in three sets.

'PASSIVE' DJOKOVIC STILL MAKING PROGRESS

In the first meeting between the pair, the impressive Tiafoe went toe-to-toe with Djokovic on Rod Laver Arena.  

The 23-year-old American's performance – coupled with the Melbourne heat – made the eight-time Australian Open champion sweat, albeit Djokovic felt he could have made life easier for himself.

"I was at times not feeling my timing as well as I normally am. Credit to him. I think he has managed to come out with a great performance and quality of tennis. He put me in a difficult spot," he said. 

"I had my chances early in the second set. If I broke him there, maybe the course of the match would be different.   

"But again, he was holding his serve very well. I was not really using my break-point chances very well. At times I was too passive. Just wasn't feeling the ball today as well as I normally do." 

Next up for Djokovic is another player from the United States in the form of Taylor Fritz, who ousted compatriot Reilly Opelka in a five-set battle.

IN THE NICK OF TIME

Kyrgios described his clash with Humbert as "one of the craziest matches I've ever played" after prevailing 5-7 6-4 3-6 7-6 (7-2) 6-4 - much to the delight of an enthralled audience who watched the drama unfold on John Cain Arena.

The Australian smashed a racket, lost his cool with umpire Marijana Veljovic over a faulty net cord sensor and had to save a pair of match points before eventually coming out on top in a see-saw battle.

"I just remember, down that end, when I was a couple of match points down, I don't know what was going on," Kyrgios - who dropped to his knees after sealing victory - said in his on-court interview.

"If you were inside my head, there were some dark thoughts in there. But I live to fight another day and hopefully I can continue to play good tennis in front of you guys."

His reward is a clash with Thiem, the third seed having dismissed the challenge of German Dominik Koepfer in straight sets as he dropped just six games.

STAN-D AND DELIVER

Wawrinka appeared on course to survive a serious scare when he rallied from two sets down against Marton Fucsovics, but the Swiss was unable to seize on the chances that came his way in a tense tie-break. 

Fucsovics had needed over four hours to overcome wild card Marc Polmans in the previous round and, once again, found a way to get over the finishing line at the end of a Melbourne marathon. 

The Hungarian trailed 6-1 during the decisive breaker, yet hit back to stun the 17th seed 7-5 6-1 4-6 2-6 7-6 (11-9). For Wawrinka, there was frustration at the missed opportunities, albeit he also praised his conqueror. 
  
"From 6-1 up, I started to hesitate a little bit in the way I was playing," he said. "I wanted to put the ball maybe too much in and I [was] not going completely for my shots and that's when I started to miss a little bit and it helped him to come back in the match.  

"He was fighting well, he's a tough player, he's a good player and he deserved to win." 

Serena Williams and Naomi Osaka sizzled in the scorching Melbourne heat on day three of the Australian Open. 

Williams, aiming once more for a record-equalling 24th singles grand slam, made serene progress from round two on what was the hottest day of the tournament so far. 

It was a similar story for Osaka, who is aiming to become a two-time champion at Melbourne Park, but Simona Halep had to dig deep while Bianca Andreescu and Petra Kvitova were early casualties on Wednesday.

PLAIN SAILING FOR SERENA AND OSAKA

Williams' perfect start to the season extended to 5-0 as she swatted aside Nina Stojanovic 6-3 6-0 to set up a round-three meeting with Anastasia Potapova – the same opponent she overcame in Melbourne in the first round a year ago. 

The seven-time Australian Open champion is looking forward to renewing acquaintances with the Russian. 

"It's always a fun, interesting match [against Potapova]. I'm gonna go home, get ready and just do the best," she said.  

"We're all out here to have fun and I'm happy to be out here, and just to be playing in front of crowd again is really cool. So every day is just fun." 

Osaka, the current US Open champion and the winner in Melbourne two years ago, hammered former world number four Caroline Garcia 6-2 6-3 on Rod Laver Arena in the evening session. 

The Japanese star is set to face her friend Ons Jabeur for the first time in an official match in round three. 

"She's really funny," Osaka said of her next opponent. "I don't know if you guys watch any of her interviews. I think she is really funny and nice.  

"I think the match I am going to play against her will be really difficult, but I'm looking forward to it." 

HALEP SURVIVES TOMLJANOVIC TEST

In contrast to Williams and Osaka's comfortable wins, second seed Halep was taken to the brink by home favourite Ajla Tomljanovic, who won the first set and was serving for the match in the third. 

However, 2018 finalist Halep broke back when trailing 5-4 in the decider and battled through with a 4-6 6-4 7-5 victory in a match that saw a combined 94 unforced errors (57 for Tomljanovic, 37 for Halep). 

"I was expecting that she would play very hard and very strong. I expected it to be a difficult match, but it was more than I thought. But I'm really happy that I can smile now," Halep said.  

"I was not that positive when I was talking to myself. I didn't talk about the score, I was just blaming myself, that I'm not strong enough to win against her. But in the end mentally I was maybe a bit stronger than her, and I didn't want to give up." 

Last year's losing finalist Garbine Muguruza (14) was too good for Ludmilla Samsonova in a 6-3 6-1 win, while French Open champion Iga Swiatek (15) dispatched Camila Giorgi 6-2 6-4. 

Aryna Sabalenka (7), Marketa Vondrousova (19) and Veronika Kudermetova (32) all made it through, but fellow seed Elena Rybakina (17) was beaten in straight sets by Fiona Ferro.

EARLY EXITS FOR ANDREESCU AND KVITOVA

Andreescu became the latest scalp for veteran Hsieh Su-Wei, who earned a commanding 6-3 6-2 victory and is now 4-3 against top-10 players in the slams since 2017. 

Eighth seed Andreescu won the US Open in 2019 but missed the entirety of last year with a knee injury, while her preparation here was disrupted by spending 14 days in quarantine after her coach tested positive for coronavirus. 

"After my first round, I thought I would feel more exhausted, but I felt amazing. Also, today the weather was a bit tricky. Being in the heart of quarantine I could have had those extra two weeks of like being in the heat and getting used to sweating and all of that," she said. 

Next up for Hsieh is Sara Errani, who defeated Venus Williams 6-1 6-0. The veteran American rolled her ankle towards the end of the first set and, despite needing two medical timeouts, valiantly saw out the match. 

Kvitova was a runner-up to Osaka in 2019 and appeared on course to recovery after dominating the second set against Sorana Cirstea. 

But amid sweltering conditions, the Czech ninth seed went on to lose the decider. 

"It was quite a rollercoaster, for sure," she said. "Unfortunately I couldn't take the chances to win the first set.  

"I think that was really the key of the match. She really had a great day today; she played a good game. I didn't really bring the best tennis today. It's really hurting."

Defending champion Novak Djokovic survived a stern test after prevailing 6-3 6-7 (3-7) 7-6 (7-2) 6-3 against Frances Tiafoe en route to the Australian Open third round.

Tiafoe threatened an upset in warm and sunny conditions at Melbourne Park, where world number one Djokovic was pushed to the limit on Wednesday.

But Djokovic dug deep to prevail in a hard-fought battle, keeping his bid alive for a record-extending ninth Australian Open crown and an 18th grand slam title.

Djokovic had only ever lost in the second round of the Australian Open on one previous occasion - in 2017, when he was upstaged by wildcard Denis Istomin in his earliest Melbourne Park exit since the opening round in 2006.

But Djokovic controlled proceedings initially, despite a blip in the first set against Tiafoe, who enjoyed his best run in Melbourne after reaching the Australian Open quarter-finals two years ago.

After racing out to a 4-1 lead, Djokovic was broken to love in the seventh game as Tiafoe reeled off back-to-back games, only to break back immediately - letting out a thunderous roar before closing out the first set in just over half-an-hour.

Not overawed, Tiafoe refused to go away, rallying from love-40 down and saving three break points in a marathon third game lasting almost eight minutes.

It set the tone for a tense second set as Tiafoe - who saw his winner count rise from five in the opening set to 17 - won a tie-breaker.

Djokovic owned a 15-4 record when splitting the opening two sets at the Australian Open, and 68-16 across majors, and he managed to claim an early break that he consolidated for a 3-0 lead to start the third set.

Tiafoe saved two set points when down 5-4 and he continued to frustrate Djokovic en route to another tie-break, but the latter prevailed, albeit unconvincingly.

The fourth set followed a similar theme until Tiafoe came unstuck at 4-3, Djokovic performing when it mattered most as he secured his passage on the back of a double-fault.

Data Slam: Djokovic dazzles from the service line

The Serbian star was always going to be hard to beat behind a strong serving display. Djokovic fired down 26 aces and won 84 per cent of his first serves, having served sat 62 per cent through the contest.

WINNERS/UNFORCED ERRORS
Djokovic – 56/37
Tiafoe – 49/43

ACES/DOUBLE FAULTS
Djokovic – 26/5
Tiafoe – 23/8

BREAK POINTS WON
Djokovic – 5/14
Tiafoe – 2/3

Former Australian Open champion Stan Wawrinka exited in the second round after a marathon loss to Marton Fucsovics.

Wawrinka, the 2014 champion, bowed out after a 7-5 6-1 4-6 2-6 7-6 (11-9) loss to Fucsovics on a warm Wednesday in Melbourne.

Fucsovics saved three match points on John Cain Arena in an encounter that lasted three hours, 59 minutes.

Wawrinka led 6-1 and 8-4 in the super tie-break, but Fucsovics won the final five points and seven of the last eight.

The Hungarian continues to enjoy the year's first grand slam, where he has reached the fourth round twice in the past three years.

Wawrinka, though, has struggled in Australia in recent years.

The Swiss star has now been eliminated in the second round in three of the past four years, while reaching the quarter-finals in 2020.

Wawrinka rallied from two sets to love down and 5-3 behind in the fifth, but wasted his chances in the super tie-break.

Serena Williams is embracing the absence of line judges at this year's Australian Open as the record-chasing American superstar dubbed herself a "futurist, like Iron Man" after reaching the third round. 

The Australian Open is taking place without linespeople as a response to coronavirus restrictions at Melbourne Park, where "Hawk-Eye Live" technology is being used on every court. 

It is the first grand slam to replace all line judges with technology as the tournament seeks to limit the number of people on court amid the COVID-19 pandemic.

After easing past Nina Stojanovic 6-3 6-0 on Wednesday, 23-time grand slam champion and seven-time Australian Open winner Williams welcomed the use of technology.

"I like it," Williams, who is looking to equal Margaret Court's record of 24 slams, told reporters when asked about the technology post-match. "I didn't like it in Cincinnati because they had that in Cincinnati and I was, it was different. It was weird. 

"I like it now because it takes away a lot of the human error, which clearly I definitely don't need. I should be the biggest fan of that. 

"But I feel like sometimes I definitely still want to see that ball, but I'm like, okay, even if I see it, the computer's going to show me what the computer just said. So that's kind of how I think about it. 

"I'm a futurist, like Iron Man, so I definitely love technology and it's something that I invest in and so, yeah, I really think is right up my alley."

Williams owns a 359-51 grand slam record in her illustrious career – the only other player to pass 300 victories in the Open Era is Martina Navratilova (306-49).

The 39-year-old Williams is bidding to win her 11th major crown since turning 30.

Only Court (three), Navratilova (three), Chris Evert (two), Billie Jean King (two), Ann Jones (one), Angelique Kerber (one), Li Na (one), Flavia Pennetta (one) and Virginia Wade (one) have won grand slam silverware in their 30s.

Petra Kvitova made a surprise second-round exit at the Australian Open on Wednesday.

The Czech ninth seed and two-time Wimbledon champion fell to Sorana Cirstea 6-4 1-6 6-1 on a warm day at Melbourne Park.

Runner-up in 2019 and a quarter-finalist last year, Kvitova bowed out after a costly 44 unforced errors in two hours, three minutes.

Cirstea, meanwhile, reached the third round of the Australian Open for just the fourth time.

It marked the Romanian's first win over a top-10 player since 2017, when she beat Karolina Pliskova in Beijing.

Cirstea will face another Czech, 19th seed Marketa Vondrousova, in the third round.

Kvitova is among 10 seeds to have departed in the women's draw, joining Victoria Azarenka, Angelique Kerber, Bianca Andreescu, Petra Martic, Johanna Konta, Maria Sakkari, Wang Qiang, Zhang Shuai and Alison Riske.

Serena Williams booked her spot in the Australian Open third round with a straight-sets win over Nina Stojanovic on Wednesday.

Williams again looked in fine form on her way to a 6-3 6-0 victory over Stojanovic in warm conditions on Rod Laver Arena.

The American star is bidding to equal Margaret Court's record of 24 grand slam singles titles and is on track after her win in one hour, nine minutes.

As her serve gradually improved, Williams – who is dealing with a right shoulder injury – was in control for the most part to set up a third-round clash against Anastasia Potapova.

Stojanovic held her own early, but Williams broke for 3-1, a powerful forehand setting up break point before a backhand error from the Serbian.

Williams was struggling with her first serve – she had a first-serve percentage of just 52 in the first set – but dug herself out of a 15-40 hole to hold for 5-2 on her way to taking the opening set.

A break to begin the second set followed as Stojanovic powered a forehand down the line wide, and three consecutive backhand errors saw her cough up another break to fall 3-0 behind.

Williams took complete control from then on, finishing the second set without an unforced error and losing just nine points to quickly wrap up victory.

Data Slam: Williams' second-round dominance continues
Williams improved her record in the second round of majors to 73-2. It also stands at 19-1 at the Australian Open, where she last failed to reach the third round on her debut main-draw appearance in 1998.

WINNERS/UNFORCED ERRORS
Williams – 27/11
Stojanovic – 15/18

ACES/DOUBLE FAULTS
Williams – 6/1
Stojanovic – 1/4

BREAK POINTS WON
Williams – 4/9
Stojanovic – 0/3

Rafael Nadal sailed into the second round of the Australian Open on day two before backing "humble" fellow Spaniard Carlos Alcaraz to have a "great career" following his maiden grand slam win.

Nadal cruised to a 6-3 6-4 6-1 victory over Laslo Djere on Rod Laver Arena on Tuesday and will face Michael Mmoh in round two.

The Spanish great's compatriot Alcaraz won his first major match at Melbourne Park, seeing off fellow qualifier Botic Van de Zandschulp 6-1 6-4 6-4.

Murcia native Alcaraz has been billed by Nadal's uncle and former coach, Toni Nadal, as his nephew's "natural replacement" and the 20-time grand slam champion says the 17-year-old has all the ingredients to have a great career.

The second seed said: "He's very good. He's very young. He has everything to improve in the future with his age.

"He already is where he is, and he has a lot of great things on his game. I really believe that he will have a great future because he's a good guy, humble, hard worker. He has a lot of positive things."

Daniil Medvedev outclassed Vasek Pospisil 6-2 6-2 6-4, while Stefanos Tsitsipas eased past Gilles Simon 6-1 6-2 6-1, but fellow seed David Goffin lost a five-set marathon with Alexei Popyrin.

Nadal happy to 'survive' 

Nadal missed the ATP Cup before starting his quest for a record 21st grand slam title at Melbourne Park due to muscle tightness in his back.

He was simply happy to clear the first hurdle on the second day of the tournament.

"I needed to survive today and that's what I did. I just tried to be focused all the time, tried to get through," he said.

"For me personally, [I'm] happy to be through to the second round. I did I think a good job today. Straight sets, that's what I did."

Tennys disgruntled over 'joke' of preparation

American Tennys Sandgren was among over 70 players who were locked down in a hotel for a fortnight before the tournament due to positive COVID-19 test on their flight to Australia.

Sandgren made no secret of his displeasure over the restrictions he was forced to adhere to and let his feelings be known again after the two-time quarter-finalist lost 7-5 6-1 6-1 to Alex de Minaur on John Cain Arena.

He said: "How would you imagine prepping for a hot kind of muggy day, three-out-of-five sets against a player like that, that calibre, when you can't play tennis? You can't go outside? You can't. It's impossible. It's impossible.

"So I played last week's event [the Great Ocean Road Open], which probably wasn't a good idea. It wasn't hot, it was very mild conditions, and I played two hard three-set matches and I've never been more sore in my life after the second round, and I took two days off because I couldn't walk, and then I hit a couple times before today. I mean, it's just kind of a joke of preparation. But yeah. What are you going to do?"

Alcaraz escaping social media hype

Big things are expected of teenager Alcaraz and there was more hype over his potential after an impressive first-round win.

Alcaraz just wants to do his own thing and show why the likes of Rafael and Toni Nadal speak so highly of him.

"So I try to be focus on me, not on the social media, to play my game, play in front of my team, to my team, to me, my family," he said.

"I try to, yeah, to be a part of the social media and don't hear the comparison with Rafa. Yeah, I try to do this."

A "calmer" Garbine Muguruza made a fine start at the Australian Open, while defending champion Sofia Kenin was left annoyed despite her victory.

A finalist at the Yarra Valley Classic last week, Muguruza's good form in Melbourne continued with a rampant 6-4 6-0 victory over Margarita Gasparyan in the first round on Tuesday.

Muguruza was runner-up at Melbourne Park last year, with the two-time grand slam winner looking for her first major success since 2017.

The Spanish star, who will face Ludmilla Samsonova in the second round, said she was reaping the benefits of a changed approach.

"I was for sure working very hard, and frustrated that the results weren't there for quite a few months. Sometimes you work hard, you want it so much, that doesn't help you," Muguruza said.

"It's hard to explain, but I felt like for a moment I was working hard, I was putting all the effort out there. The time that I had to go and compete, I wanted it too much. I was getting frustrated too early. At the end I couldn't let the racquet talk.

"I feel like now, after that experience, I managed to stay a little bit calmer and to just go and compete, probably have less expectations. I'm always, like, there and always so pumped. I'm just knowing myself a little bit better now, finding ways to compete and not let that energy and that desire, too much desire, get in the way probably."

It was a relatively good day for the top women's seeds, with Kenin – who conquered Muguruza in last year's final – winning through.

Ash Barty, Elina Svitolina, Karolina Pliskova and Belinda Bencic also advanced, while Victoria Azarenka's poor recent record in Melbourne continued.

KENIN ANNOYED DESPITE WIN

Kenin started her title defence with a 7-5 6-4 victory over Australian Maddison Inglis.

But while the American fourth seed mixed 23 winners with 27 unforced errors, Kenin said she felt her nerves as she defends a major crown for the first time.

"I was obviously quite annoyed the whole match. I felt like the first two points I started off well, then wasn't able to close out the first game. Obviously nerves happen," she said.

"She obviously played really well. She's a tricky opponent, tricky player. Yeah, it was quite hard on myself today, quite annoyed, as you said."

Kenin's next clash is a tough encounter against Kaia Kanepi, who brushed past Anastasija Sevastova 6-3 6-1.

BARTY, SVITOLINA AND PLISKOVA AMONG WINNERS

Barty made a spectacular start with a 6-0 6-0 thrashing of Danka Kovinic.

The world number one won the first 16 points and ended up losing just 10 for the match in an impressive start.

A two-time quarter-finalist at the Australian Open, Svitolina was tested but overcame Marie Bouzkova 6-3 7-6 (7-5) on Rod Laver Arena.

A huge challenge awaits Svitolina, who will next face Coco Gauff after the 16-year-old American beat Jil Teichmann 6-3 6-2.

Czech sixth seed Pliskova made quick work of Jasmine Paolini, wrapping up a 6-0 6-2 victory in just 47 minutes.

Bencic and Anett Kontaveit were among the other seeded winners.

NO EXCUSES FOR AZARENKA

A two-time Australian Open champion, Azarenka suffered a surprise 7-5 6-4 loss to Jessica Pegula in the first round.

The Belarusian's last win at the event came in 2016, having made first-round exits in 2019 and 2021 and missed the tournament in 2017, 2018 and 2020.

Azarenka was among the players forced to quarantine ahead of the major and while she said it played a part in her exit, she offered no excuses.

"Of course, it has impacted. Somebody who's coming out of hard quarantine and maybe has been able to adjust well, they'll go, 'Oh, maybe it hasn't impacted'. Somebody who lost early will say, 'Yeah, of course, it's impacted'. It would be hard to say," she said.

"Was that the best preparation for me? No. But try to sit here and find an excuse because of quarantine and this is just something that, as I said, it is what it is.

"I am disappointed that I wasn't able to perform that I knew I could. That's a bit hard to accept today because I knew I can play better, a lot better. At the same time I feel that I've tried everything I can to be able to be prepared, but unfortunately that hasn't worked out for me."

Greek 20th seed Maria Sakkari also bowed out after a loss to Kristina Mladenovic, while British 13th seed Johanna Konta retired injured while leading Kaja Juvan 6-4 0-2.

Ash Barty made an impressive start to the Australian Open, thrashing Danka Kovinic in the first round on Tuesday.

Barty, who last year became the first Australian woman to reach the semi-finals of the tournament since Wendy Turnbull in 1984, hammered Kovinic 6-0 6-0 on Rod Laver Arena.

Winner of last week's Yarra Valley Classic, Barty won the first 16 points against Kovinic and never looked back.

The world number one wrapped up victory in just 44 minutes, finishing the contest having lost only 10 points.

Kovinic's unforced errors piled up early – the Montenegrin made 14 in the first set – as 2019 French Open champion Barty quickly took control and the opener.

There was a very brief test for Barty to begin the second set, but the Australian was untroubled as Kovinic had no answers.

Barty will meet either Daria Gavrilova or Sara Sorribes Tormo in the second round.

Data Slam: Barty blitz sets up win
Barty made an incredible start, racing into a 4-0 lead without dropping a point. Her hopes of a golden set were ended when she sent a backhand long, but the start put her in immediate control.

WINNERS/UNFORCED ERRORS
Barty – 10/5
Kovinic – 3/28

ACES/DOUBLE FAULTS
Barty – 5/0
Kovinic – 2/2

BREAK POINTS WON
Barty – 6/8
Kovinic – 0/0