An Olympic gold medal would be most athletes' prized possession, but Alexander Zverev's ownership has perhaps been a little more carefree – or it was until he found himself wondering if his brother had sold it on eBay.

Zverev claimed arguably the biggest title of his career last year when claiming gold in Tokyo, adding that to his 2018 ATP Finals success – he went on to repeat that triumph at the year-end tournament in Turin.

The German beat Novak Djokovic in the semi-finals at the Olympics before going on to defeat Karen Khachanov in straight sets to win the tournament.

That made him the first German man to win a gold in the singles and first to win any medal since Tommy Haas got silver 21 years earlier.

While some might tend to their gold medal on a daily basis, polishing it generously as it takes pride of place on the mantelpiece, it turns out Zverev has not actually seen his for a while.

His older brother Mischa has had it for a few months, leaving the younger sibling not even sure if it is still in the family's possession.

After beating Australian's John Millman to reach the third round of the Australian Open, Zverev was asked where he keeps his gold medal, to which he replied: "That's actually a good question because my brother took it for a media appearance.

"He didn't give it back to me yet. I don't know where it is for the past five months. Hopefully he hasn't sold it on eBay or something."

Zverev will presumably be a little more attentive to any silverware he claims in Melbourne this year, with the 24-year-old still chasing his first major.

Seeded third this month, Zverev is certainly considered one of the favourites after an excellent 2021 in which he won six titles, more than anyone else on the ATP Tour.

Zverev was initially on course to meet Djokovic in the semis, but the Serbian's absence means many will consider him the favourite to reach the showpiece from his side of the draw and he has made a solid start.

After dispatching fellow German Daniel Altmaier, Zverev saw off the tricky Millman, a big-serving Australian who understandably had the crowd's backing on Rod Laver Arena, coming through both games in straight sets.

"My tactic today was to hit the ball as slow as possible," he said. "That was my mindset going into the match, but hopefully I can hit it even harder next match and harder the next match after that.

"I could really feel that you guys have been locked down for two years. I'm prepared that everybody will hate me after the match. It's quite accurate and that's my mindset.

"I'll get a lot of boos and hopefully everybody will cheer against me. I'm kidding."

Andy Murray knows it would have been easy to retire from tennis after his hip surgery but is instead revelling at being able to compete at the Australian Open once again.

Former world number one Murray is featuring in the season's first grand slam for the first time in three years.

In true Murray fashion, he overcame Georgian 21st-seed Nikoloz Basilashvili in five sets in a mammoth first-round tie to set up a clash with Japan's Taro Daniel on Thursday.

That Murray is here at all is remarkable given the scenes in 2019 when the now 34-year-old gave an emotional news conference following a first-round defeat to Roberto Bautista Agut questioning whether he would be able to continue playing.

Speaking about his Melbourne return, Murray told BBC Sport: "To be finally back at the Australian Open again this year, playing on the same court as 2019 and then beating Basilashvili in five sets, was a brilliant experience.

"In 2019 it didn't feel like it was me out there on the court. I was severely hampered physically and had little to no preparation. I didn't know if I was going to be able to play again.

"After the hip surgery, and loads of stops and starts with more niggles, playing in grand slams again is a place which I have worked so hard to get to.

"It would have been easy to stop playing, but I kept trying and trying. I'm proud of that work and effort."

Murray was unable to compete in Melbourne in 2021 after testing positive for COVID-19.

"There was another setback last year when I couldn't come to Australia because I tested positive for coronavirus shortly before I was supposed to fly out," he continued.

"That was brutal for me. I had trained really hard through the end of November and December, I was playing really well. I had played lots of practice, I felt really fit and then that positive test happened. I was gutted.

"I was healthy, I'd just had the virus and recovered from it. I understood the rules and situation here in Melbourne but I just wished I would have been able to play."

Murray reached the final of the Sydney Classic earlier in January, eventually going down to Alan Karatsev 6-3 6-3. It was just the second ATP Tour-level final he has reached since the start of 2019.

Now, the three-time major winner is hoping to push on after that morale-boosting success over Basilashvili.

"Beating Basilashvili was a big win for me," Murray added. "A lot of work has gone into getting back to this tournament and to physically compete at the highest level, so beating a guy ranked in the top 25 and winning a match in five sets was very satisfying.

"I'm probably never going to move as well as I did as I did when I was 25.

"But the more matches I play, staying healthy for a long period of time and not missing lots of training, means I am going to continue to improve my movement. Then, my physicality on the court will get better."

Naomi Osaka will face Amanda Anisimova in round three of the Australian Open after easing past Madison Brengle on Wednesday.

The two-time champion in Melbourne won 6-0 6-4 to set up a meeting with the 20-year-old American, who earlier upset Olympic gold medallist Belinda Bencic in straight sets.

Despite a second-set wobble on serve that gave Brengle hope of a comeback, Osaka looked in comfortable control of the contest and has now dropped just one set in her five matches in 2022.

Brengle was a 6-2 6-2 winner in the only previous meeting in Rock Hill way back in 2013, when Osaka had just turned 16 and had barely any Tour experience. Against the Osaka of 2022, a four-time major champion, she had few answers.

Osaka tore through Brengle's defence in the opening set, wrapping it up in 20 minutes while dropping just three points on serve.

Brengle was credited with just one winner in her chaotic first-round match with Dayana Yastremska, who retired trailing 6-1 0-6 0-5. It was not until the second game of the second set that Brengle matched that tally, but it was worth the wait: a brutal inside-out backhand across court, celebrated with gusto, as she began to make inroads on the Osaka serve.

Osaka dug deep, saving three break points before holding for 2-1 and then another with a timely ace in her next service game. Her play was becoming erratic, though, and after saving a further three break points at 3-3, a wild overhead handed Brengle the breakthrough.

Yet if the 31-year-old thought then that the match was just getting started, it was suddenly over. Osaka broke back immediately with a backhand volley at the net and did not lose another point from there, clinching the contest when Brengle's passing shot dropped wide.

DATA SLAM: Osaka into overdrive

Brengle quadrupled her winner count from her first-round match, but the world number 54 was simply outgunned by Osaka when it came to rallies.

The Japanese star fired in 37 winners to 32 unforced errors, turning on the power just when it seemed like the contest was balancing out.

WINNERS/UNFORCED ERRORS
Brengle – 4/14
Osaka – 37/32

ACES/DOUBLE FAULTS
Brengle – 0/1
Osaka – 8/1

BREAK POINTS WON
Brengle – 1/10
Osaka – 5/7

Rafael Nadal insisted he does not feel any significant pressure at the Australian Open as he goes in search of a record-breaking 21st grand slam singles title.

The Spaniard eased into the third round on Wednesday with a 6-2 6-3 6-4 over Yannick Hanfmann on Rod Laver Arena.

Nadal, who is now 16-0 in the second round of this event in his career, has enjoyed an encouraging return to action in 2022 following a foot injury.

The 35-year-old won the Melbourne Summer Set warm-up tournament, collecting his 89th title on the ATP Tour in the process, and is now 5-0 for the season.

With Novak Djokovic not involved, the prospect of Nadal winning a second Australian Open title – and a record 21st major overall – is very real.

None of Nadal's vanquished opponents this month are in the top 50 in the world, though, and he could face 28th seed Karen Khachanov in round three before a possible quarter-final against world number three Alexander Zverev.

Still, rather than worry about the matches to come, Nadal is simply enjoying being back on court and retuning his game.

"As I said here before the tournament started, things [are] not going to be perfect, but every day that I'm going to spend on court, the chances to play better are higher," he said.

"I think I am doing things well. Things that I can improve, I have to improve. I want to keep going in the tournament. But winning today allows me to practice again tomorrow, to be ready for another match. After two matches it's the moment to make a step forward. It's not going to be impossible. I'm going to try.

"I'm excited about it. I'm excited about the fact that I'm going to be playing in a third round for one more time here after all the things I am going through.

"I don't have big pressure on my shoulders, honestly. I don't feel it. The pressure is only to stay healthy and to enjoy the fact that I am competing again, then give my best as I did during all my tennis career."

Asked about the potential Zverev match-up, Nadal added: "I don't know. I am in the third round. I need to win very tough matches to be there. It is not in my mind now. I have enough work.

"I think playing against Khachanov now, probably Khachanov, [is] going to be a big challenge.

"I never think that far. You can imagine now less than ever, no? Just staying focused on my daily work, on what's coming, and that's it. One moment in time, that's it."

World number one Ash Barty is wary of Camila Giorgi's ability to "hit you off the court" ahead of their meeting at the Australian Open.

Barty crushed Lucia Bronzetti 6-1 6-1 in the second round on Rod Laver Arena on Wednesday.

The Australian has lost just three games in the opening two rounds at Melbourne Park, where she is bidding to win her third grand slam title.

Another Italian, 30th seed Giorgi, awaits in the third round and Barty is wary of the hard-hitting 30-year-old.

"Some very different challenges to what I've had the last couple matches. She has the ability to hold baseline, to control the centre of the court, be super, super aggressive off her serve and first shot, particularly off her return," she said.

"It's going to be a match where I'm going to have to serve well, bring in variety, make sure I can cover the court, neutralise the best that I can. She has the ability to hit you off the court without realising it's happening.

"I think it's going to be another match with some fresh challenges. But having played her before, she kind of knows my game, I kind of know hers. It's about going out there and trying to do it as good as I can."

In three previous meetings with Giorgi, Barty has never lost, although the most recent of those came at the 2018 Australian Open.

Barty has been in impressive form so far in Melbourne and was pleased with her performance against Bronzetti.

"Yeah, I felt good. I felt like I wanted to try to use my experience a little bit today, get off to a quick start. I felt like I was able to do that," she said.

"I served well. I was able to find plenty of forehands and control the match quite well, so pleased with that one."

Rafael Nadal remains on track for a record-breaking 21st grand slam title after getting past Yannick Hanfmann at the Australian Open.

Nadal, bidding to become the outright record holder for the most majors won by a man, was too good for Hanfmann in a 6-2 6-3 6-4 victory in the second round on Wednesday.

The Spanish star had won his only previous meeting with the German – at the French Open in 2019 – and proved too strong on Rod Laver Arena.

Nadal will face either Russian 28th seed Karen Khachanov or Frenchman Benjamin Bonzi in the third round.

Hanfmann held his own early, but Nadal landed the first break in the sixth game, a backhand winner down the line followed by a volley to give him a 4-2 lead.

A break point went begging for Hanfmann in the next game and Nadal punished him, a tremendous backhand winner down the line clinching the set.

Just as the sixth game looked set to be Hanfmann's undoing again, the German saved a break point and held for 3-3.

But a pair of forehand winners would give Nadal a 5-3 lead on his way to taking the second set.

The contest looked over as Nadal broke for 2-1 in the third set when Hanfmann sent a forehand long to end a 22-shot rally.

And that proved to be the case, Nadal digging out of a 0-30 hole in the eighth game – and jumping in celebration – before closing out his win with another tough hold.

DATA SLAM: Nadal's second-round perfection in Melbourne intact

Nadal has never lost in the Australian Open second round.

He improved that record to 16-0 with the win over Hanfmann. Only once in his career has the 2009 champion bowed out before the third round in Melbourne – losing to Fernando Verdasco in his opener in 2016.

WINNERS/UNFORCED ERRORS
Nadal – 30/26
Hanfmann – 30/32

ACES/DOUBLE FAULTS
Nadal – 1/5
Hanfmann – 5/1

BREAK POINTS WON
Nadal – 4/16
Hanfmann – 0/2

Nick Kyrgios is box office whenever he plays – and the Australian Open gets a first-week gift in the form of a second-round blockbuster against Daniil Medvedev.

Kyrgios still managed to bring John Cain Arena to life even during a relatively straightforward 6-4 6-4 6-3 win over Liam Broady on Tuesday.

The Australian, who has dropped to 115th in the rankings after not playing since last year's US Open, is arguably the must-watch player in the men's draw.

Anything can happen when Kyrgios is in action. For all the frustrations about a thus far unfulfilled talent, Kyrgios – a two-time grand slam quarter-finalist – is box office.

On Thursday he faces the highest ranked player in the men's draw, last year's US Open champion Medvedev, in what shapes as being a thrilling contest.

Kyrgios has won both of his previous meetings with the Russian second seed, who is among the favourites to win the title at Melbourne Park.

With Roger Federer absent and Novak Djokovic having been deported from Australia, tournament officials have been gifted a contest that belongs in the second week.

All eyes will be on Thursday's schedule, with Kyrgios seemingly likely to miss out on playing on his preferred court – John Cain Arena – in a match that undoubtedly belongs on Rod Laver Arena.

"I mean, obviously either way it's going to be a hell of an experience for me. He's probably the best player in the world at the moment. So I'm pretty excited, I'm excited for that moment. That's why I play the game," Kyrgios said after beating Broady.

"I feel like those matches still excite me, to go out there and play the best in the world. That was always something I wanted to prove to people that someone like me could do, win those matches. I'm not going to go into it with a lot of expectation. I'm going to go out there, have some fun, play my game. I have a pretty set-in-stone game plan of what I need to do to have success.

"As I said, he's probably the best player in the world, he does everything extremely well. He's a hard worker, ticks all the boxes. I'm not going to even think about that now. To play it on John Cain would be – I'm just going to call it the Kyrgios Court – would be fun."

Kyrgios and Medvedev played twice in 2019, the Australian winning two tie-breaks in their most recent meeting in the final in Washington in August of that year.

Medvedev was a top-10 player then, but it would be later in that year that the Russian would truly make an impact, edged by Rafael Nadal in the US Open final.

He went 20-3 at majors last year, winning the title at Flushing Meadows, reaching the final in Melbourne and the French Open quarter-finals.

When he met Kyrgios in Washington, Medvedev had won four ATP titles. He now has 13 to his name.

"Yeah, I just became a different player in terms of ranking and titles. It gives you experience. That's where you can try to win matches which you have lost before, opponents which you have lost before," Medvedev said following his opening-round win against Henri Laaksonen.

"I think there are still some guys on tour who I haven't beat. So can stay like this. I think our last match was so long ago and we are both so different and a different momentum of our careers that it's really tough to count it. As I say, win or lose, I don't think these two matches gonna count into this one, so yeah."

Ash Barty continued her impressive start to the Australian Open with a resounding win over Lucia Bronzetti on Wednesday.

The world number one dropped just one game in the first round and was similarly rampant in the second, crushing Bronzetti 6-1 6-1 on Rod Laver Arena.

Barty, a two-time grand slam champion, raced through in just 52 minutes to set up a meeting with another Italian, 30th seed Camila Giorgi.

The Australian remains on track for a blockbuster fourth-round meeting with Japanese star Naomi Osaka.

Barty quickly broke the Bronzetti serve, taking a 2-0 lead after a double fault and tame backhand into the net from the Italian.

Bronzetti won just one point during her opening two service games as Barty broke again for 4-0, on her way to taking the first set in just 26 minutes.

The one-sided encounter continued to begin the second set, a pair of double faults from Bronzetti helping Barty break to love in the third game.

Barty remained untroubled, cruising through in style as her run in Melbourne continued.

DATA SLAM: Brilliant Barty continues early blitz

Barty has dropped just three games through two rounds at the Australian Open.

That is the fewest number of games she has lost through the opening two rounds of a grand slam in her career, better than last year's Australian Open (seven).

WINNERS/UNFORCED ERRORS
Barty – 21/14
Bronzetti – 6/14

ACES/DOUBLE FAULTS
Barty – 8/2
Bronzetti – 1/5

BREAK POINTS WON
Barty – 5/6
Bronzetti – 0/0

Nick Kyrgios threw in an underarm serve in the second game of his Australian Open campaign, before tossing in a curveball in the post-match news conference.

Speaking after his 6-4 6-4 6-3 win over an outmatched Liam Broady on John Cain Arena, Kyrgios proposed he might play doubles with Novak Djokovic in the future.

Australian Kyrgios has dramatically changed his tune on the Serbian, but not in the way many have altered their perspective following recent events.

Djokovic was deported from Australia in the hours before the Australian Open got under way, a consequence of his own failure to get a COVID-19 vaccine and seemingly mixed messages from authorities before a court settled the kerfuffle.

His behaviour in December after a positive COVID-19 test has been widely criticised, and the reputation of arguably the greatest tennis player of all time has taken a battering in the past fortnight.

Kyrgios recently observed the treatment of Djokovic, a nine-time champion of the Melbourne Park grand slam, had been "really bad" and said it was important to "do better" by the 20-time slam winner.

The 26-year-old from Canberra has emerged as an unlikely cheerleader for the player he described as "a tool" and "a very strange cat" last February, after Djokovic was reported to have requested improved quarantine accommodation on arriving in Australia.

Now Kyrgios is revelling in his apparent sudden popularity in Serbia, where Djokovic's banishment from Australia was greeted with anger and dismay.

"I mean, it's great," Kyrgios said of his new standing. He then turned his focus to why he has stood up for his new friend.

"Obviously me and Novak have had some, I guess, differences in the past. But whether it was Novak or someone else, I would have done the same thing," he said.

"I didn't do it because he was Serbian. If it was another player in that scenario, I would have stood up for what I think was right.

"I think it was just coincidentally it was Novak, and, you know, it was quite a story. But we've got a bit of a bromance going on now, so I'm not going to complain.

"I think I'm going to ask him to play doubles somewhere."

It remains to be seen where this might next prove possible. Djokovic might find he needs a vaccination to play the French Open and US Open this year, amid reports an increasing number of tournaments will insist on players being immunised as a condition of entry.

Kyrgios, meanwhile, faced a daunting second-round match in Melbourne, with title favourite and de facto top seed Daniil Medvedev awaiting him.

Emma Raducanu triumphed in a battle of US Open champions as she started her Australian Open campaign with victory over Sloane Stephens.

The 19-year-old stunned the tennis world when she claimed the title at Flushing Meadows last year after progressing all the way through the qualifying rounds and main draw without dropping a set.

The Briton struggled to build on those famous two weeks in New York, losing four of her next six matches including a 0-6 1-6 thrashing by Elena Rybakina at this month's Sydney Tennis Classic.

However, she put that result firmly behind her with an impressive 6-0 2-6 6-1 defeat of Stephens in her first match in the main draw of the Melbourne grand slam.

The first set was in keeping with Raducanu's US Open performance as she clinched it in just 17 minutes while dropping only four points.

But American Stephens, champion in her home slam in 2017, fought back in the second set and set up a decider with a forehand winner.

Yet the 17th seed responded well, marching into a 5-0 lead before serving out the match to set up a second-round clash with Danka Kovinic.

"I think both me and Sloane really put everything out there and gave it everything we had," she said.

"I think it was a really high-quality match, with some very long rallies. I'm very happy to come through against a great champion like her."

Nick Kyrgios compared the crowd during his Australian Open first-round win to a zoo as fans copied a famous Cristiano Ronaldo celebration at almost every point.

Cries of 'siuu' could be heard throughout much of the home favourite's straight-sets victory over Liam Broady, his first match since a Laver Cup defeat to Stefanos Tsitsipas in September.

The shouts were apparently mimicking Manchester United star Cristiano Ronaldo's famous goal celebration.

There were similar incidents during Andy Murray's battling five-set win over Nikoloz Basilashvili, as the five-time finalist won his first match at the Melbourne major since 2017.

The raucous crowds caused confusion as many observers wondered if Murray and Kyrgios were being booed on court, despite each player also enjoying huge support.

Kyrgios later explained he was not surprised to hear the noise from the stands but was taken aback by how long they persisted.

"It's just a stupid, f***, I can't believe they did it so much," he said after his 6-4 6-4 6-3 victory on John Cain Arena. "They were doing some Ronaldo thing. Ronaldo does it every time he scores.

"It's like... I thought they were going to do it for like 10 minutes. They did it for two and a half hours, like, every point. I don't know why. It was a zoo out there."

Murray had wondered if the crowd was turning on him during his epic 6-1 3-6 6-4 6-7 (5-7) 6-4 victory because he had been targeted during his practice session on Monday.

"Initially, I thought it was [booing] because there were some people booing during my practice yesterday," he said. "I have no idea what for! 

"But then, after a few times, it was like, no, they're doing that, I think it's like 'Siuu' or something that Ronaldo does when he scores. And, yeah, it was incredibly irritating!"

Kyrgios produced some superb if often unorthodox tennis as he booked a second-round clash with world number two Daniil Medvedev, who is the highest-ranked male in the draw following the refusal to allow Novak Djokovic to compete.

The 26-year-old would like to return to John Cain to aid his chances of improving his record against the Russian to 3-0.

"It's going to be a hell of an experience for me," he said. "He's probably 'the' best player in the world at the moment. So I'm pretty excited, I'm excited for that moment. That's why I play the game.

"I feel like those matches still excite me, to go out there and play the best in the world. That was always something I wanted to prove to people that someone like me could do, win those matches.

"I'm not going to go into it with a lot of expectation. I'm going to go out there, have some fun, play my game. I have a pretty set-in-stone game plan of what I need to do to have success.

"As I said, he's probably the best player in the world, he does everything extremely well. He's a hard worker, ticks all the boxes. I'm not going to even think about that now. To play it on John Cain would be – I'm just going to call it the Kyrgios Court – would be fun."

Andy Murray marked his return to the Australian Open with a thrilling five-set win over Nikoloz Basilashvili and immediately targeted "a deep run" in the competition.

The three-time grand slam winner edged 21st seed Basilashvili 6-1 3-6 6-4 6-7 (5-7) 6-4 in a first-round match that lasted three hours and 52 minutes.

It is Murray's first win at the tournament in five years in what was his first outing at Melbourne Park since 2019, when he thought he might have to retire.

Murray was playing on the same court where a retirement video was played after defeat to Roberto Bautista Agut three years ago.

But the 34-year-old has battled back from injury setbacks admirably and last week reached his first ATP Tour final since October 2019 at the Sydney Classic.

With Japan's Taro Daniel now standing between Murray and a place in round three of the Australian Open, the five-time beaten finalist is eager to make up for lost time.

"It's amazing to be back," Murray said in his on-court interview. "It's been a tough three, four years. 

"I have put a lot of work to be back here and I have played on this court many times and the atmosphere has been incredible. 

"I have always had fantastic support and this is the court I thought I potentially played my last match on. 

"But it is good to be back, winning a five-set battle like that. I could not ask for any more.

"I would love to have a deep run here if possible. It's something I have not had at one of the slams since I came back from the injury and it is something that motivates me."

Wild card Murray broke hard-hitting Basilashvili nine times on John Cain Arena, but he looked physically drained as the match dragged on.

The former world number one showed incredible resolve to take the deciding set, however, against an opponent that had lost just once in seven previous five-set battles.

"I will hopefully keep improving. There are things in my game I can definitely do better," Murray said.

"I have played some of my best tennis here over the years. I feel comfortable here and I hope I can do well here this tournament."

Daniil Medvedev is happy to be considered the favourite for the Australian Open title but says Rafael Nadal remains the man to beat at Melbourne Park.

World number two Medvedev is now the top-seeded player in the competition after Novak Djokovic was deported from Australia on Sunday.

Competing in his first grand slam since winning the US Open in September, Medvedev made a solid start by seeing off Henri Laaksonen 6-1 6-4 7-6 (7-3) on Tuesday.

The Russian, who lost last year's Australian Open final to Djokovic in straight sets, will now take on either Liam Broady or Nick Kyrgios in round two.

He is aiming to become the first man in the Open Era to follow up his maiden Grand Slam title with another in his next major appearance.

Medvedev is not shying away from the spotlight, but the 25-year-old considers Nadal the real favourite for the trophy because of his incredible record.

"I like pressure but last year I started well here in Australia in the ATP Cup and I managed to be in the final here," he said.

"The tournaments in Australia are always really important for me. I like to play in Australia on hard courts. I want to do better here than I did last year but it's not going to be easy.

"But I always say whoever is the highest ranked is the favourite so this time I will go with Rafa because he has 20 Grand Slams."

The 20 major singles titles won by Nadal is equal to Djokovic and Roger Federer, who is also absent in Melbourne due to injury, as the most by a men's player.

Just one of those titles have come at the Australian Open, however, with the Spaniard – who beat Marcos Giron in his opening match on Monday – going all the way in 2009.

Nadal and Medvedev are in opposite sides of the draw and are on course to meet in the final, but many challengers await between now and then.

That path became a little clearer on Tuesday as world number eight Casper Ruud withdrew from the tournament due to an injured ankle.

Ruud had been due to face Alex Molcan in the first round, but his place will be taken by lucky loser Roman Safiullin.

Petra Kvitova was convincingly beaten to bow out of the Australian Open in straight sets in the first round on Tuesday.

The Czech 20th seed, a finalist in Melbourne in 2019, was crushed 6-2 6-2 by Romanian Sorana Cirstea on John Cain Arena.

Kvitova produced a staggering 39 unforced errors with just seven winners to bow out in 71 minutes.

It continued a mixed record at Melbourne Park for the two-time Wimbledon champion.

Kvitova has now bowed out of a grand slam in the first round 11 times – with four of those coming at the Australian Open.

Cirstea will face either Misaki Doi or Kristina Kucova in this year's second round.

The 31-year-old also beat Kvitova at the Australian Open last year – in the second round.

Coco Gauff reflected on a hugely disappointing Australian Open defeat as the two leading United States players exited the women's draw on day one in Melbourne.

Gauff is ranked 16th, closing on top American Sofia Kenin in 13th, but neither advanced to the second round on Monday.

The 17-year-old was stunned 6-4 6-2 by Wang Qiang in a sloppy display that included 38 unforced errors, with 21 in a second set in which she fell 5-0 behind.

Meanwhile, Kenin was beaten by compatriot Madison Keys, who came into the tournament in high spirits having won her sixth career title – and first since 2019 – at the Adelaide International 2. That run included a semi-final defeat of Gauff.

After her latest loss, Gauff said: "I think just everything disappointed me about today.

"I feel like in the pre-season I worked really hard, and I felt like I was ready to have a good run here. Today I just didn't perform well.

"I think there's a lot to learn from. I think I was playing a little bit tighter than normal.

"So I think next time coming into the first round of a slam, especially after a tough week before, I think I need to just play more free and focus on the moment."

Keys is playing with that freedom, eager to move on from a dismal 2021 in which she won only 11 matches.

"I'm not taking it quite as seriously, that's the biggest difference this year," she said.

Keys already has seven wins in eight matches in 2022, defeating fellow Americans in each of her past three outings.

Of the win over 2020 champion Kenin, she said: "At this point every first round is tough, but when you have to go up against a grand slam champion it's never easy.

"I think knowing that she was going to compete so well, I just had a really good mentality and attitude. I had a couple of opportunities I didn't really capitalise upon and I was able to reset and continue to play well.

"I had my first real run in a slam here, I missed last year, so absolutely ecstatic to be back in Melbourne. It would mean the world to have another run here."