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."

World number one Ash Barty kicked off her Australian Open title bid with a convincing straight-sets victory over Ukrainian qualifier Lesia Tsurenko on Monday.

The two-time grand slam winner, whose previous best finish on home soil at Melbourne Park was a run to the semi-finals in 2020, prevailed 6-0 6-1 in a time of just 54 minutes.

Barty held serve throughout the one-sided contest with Tsurenko and is now unbroken in 41 successive service games across her last four matches.

"It's certainly nice to be back on home soil and playing as well as I did tonight. It was a lot of fun out here," Barty said in her on-court interview.

"I felt like it was nice and clean. End-to-end I did a good job in adjusting. Tonight it was just nice and solid to get out here and play a decent match and feel like I enjoyed it."

Tsurenko took Barty to three sets when they met in this competition two years ago, but the world number 113 was outclassed on this occasion.

Looking to build on her recent Adelaide International success, Barty eased through the first set as she dropped just 12 points.

Barty was just as dominant in the second set, but she squandered two match points in the sixth game to miss out on a double-bagel to begin her campaign in Melbourne.

Not that it mattered a great deal, though, as the 25-year-old emphatically served out the match to set up a meeting with Italian qualifier Lucia Bronzetti for a place in round three.

DATA SLAM: Barty makes statement start

Barty came through this first-round match with minimal stress and looks in great shape as she bids to become the first Australian to win here since 1978.

The pressure is no doubt on as the pre-tournament favourite, with no top-seeded player in the women's draw failing to make at least round four since Virginia Ruzici in 1979.

WINNERS/UNFORCED ERRORS

Barty – 14/17
Tsurenko – 4/21

ACES/DOUBLE FAULTS

Barty – 5/0
Tsurenko – 0/1

BREAK POINTS WON

Barty – 5/8
Tsurenko – 0/2

Rafael Nadal believes it would be "better for everybody" if Novak Djokovic was competing at the Australian Open, while declaring the situation a "mess".

Nadal sits level on 20 grand slam titles with Djokovic and Roger Federer but is the only one of tennis' 'Big Three' featuring in Melbourne.

Federer was ruled out due to ongoing knee injury problems, while Djokovic saw his visa cancelled for a second time on Sunday as he appealed Australia's refusal to let him into the country.

That ruling owed to Djokovic's unvaccinated status and Australia's coronavirus guidelines, leaving the Serbian unable to defend his Melbourne Park crown and seek a record-extending 21st grand slam.

Nadal has previously said he was "tired" of talking about the Djokovic saga, but the Spaniard again offered his thoughts after defeating Marcos Giron in the first round on Monday.

"Almost one week ago when he won in the first instance, the case, he was able to get back his visa and practising. I said the justice has spoken," Nadal told reporters.

"If the justice says his visa is valid and he's able to play here, the justice has spoken, so that's the fairest thing, that he deserves to play here. Yesterday the justice said another thing. I will never be against what the justice says.

"Another thing is what I believe personally and what I believe is the ideal situation personally, no?

"The ideal situation in the world of sport is that the best players are on court and playing the most important events. That's better for the sport without a doubt.

"If Novak Djokovic is playing here, it's better for everybody, no doubt about that. Another thing is what happened. As I said in the beginning, I can't say another thing because I believe that the situation is very clear now."

Pressed for an answer on his relationship with the 34-year-old world number one, Nadal wished his fellow competitor all the best.

"He's not the only one that did bad things in that case," Nadal added.

"Of course, there are more responsibilities on all for this terrible situation that we faced for the last two weeks. But of course, he is one of those responsible, too.

"So on a personal level, yes, I would like to see him playing here. If it is fair or not that he's playing here is another discussion that I don't want to talk anymore about that."

Nadal advanced to the second round in Melbourne with a cruising 6-1 6-4 6-2 victory over American Giron, who is ranked 66th in the world.

That was Nadal's fourth win of the year after triumphing at the Melbourne Summer Set and he appears to have battled through his foot injury, though he still expressed concerns over his fitness.

"It's been a very challenging few months… tough moments with a lot of doubts – there still are doubts," he said.

"But I am here and I can't be happier to be back in Australia in this amazing stadium.

"You never know when you come back from injury, which unfortunately I have a lot of experience with, how things will be, so you have to take it day by day. You have to forgive yourself if things aren't going the proper way."

Awaiting Nadal in the second round of the tournament will be either Australia's Thanasi Kokkinakis or Yannick Hanfmann of Germany.

Novak Djokovic could make an earlier-than-expected return to Australia despite the Serb facing a three-year ban from the country, according to prime minister Scott Morrison.

The world's number-one ranked player, who is level on 20 grand slam titles with Rafael Nadal and Roger Federer, saw his visa cancelled for a second time on public health grounds on Sunday.

Djokovic was attempting to overturn the original decision to refuse his entry into Australia, which was due to his unvaccinated status and the country's coronavirus rules.

That leaves the 34-year-old unable to defend his Australian Open title at Melbourne Park, while he was also handed an automatic three-year ban from the country under immigration law, unless Australia's immigration minister overrules the judgement.

Compelling or compassionate reasons would be needed to do so, but Morrison refused to rule out the possibility of Djokovic making an early return.

"I'm not going to precondition any of that or say anything that would not enable the minister to make the various calls he has to make," Morrison said to 2GB Radio on Monday.

"It does go over a three-year period, but there is the opportunity for [a person] to return in the right circumstances, and that will be considered at the time."

Morrison then insisted that Djokovic, who has already expressed his disappointment with the ruling, and any other entrant to Australia must comply with their rules.

"If you're someone coming from overseas, and there are conditions for you to enter this country, then you have to comply with them," he continued.

"This is about someone who sought to come to Australia and not comply with the entry rules at our border."

The Australian Open started on Monday, with Nadal advancing past Marcos Giron in his first-round match.

Naomi Osaka insisted she was unaffected by the saga surrounding Novak Djokovic ahead of the Australian Open.

Osaka opened her title defence at Melbourne Park with a 6-3 6-3 win over Colombian Camila Osorio on Monday.

The lead up to the year's first grand slam was overshadowed by the visa saga around Djokovic, who was deported from Australia on Sunday.

But Osaka, a four-time major winner, said the Serbian world number one's situation had no impact on her.

"I mean, to be completely honest, it didn't really affect me. I saw that it affected the men's draw a little bit so you might have to ask a men's player," she said.

"For me, my goal even before this whole situation is to just focus on myself more, what I need to do to become better.

"I wasn't really, I guess, looking at the news too often."

Osaka was unwilling to be drawn on whether Djokovic, whose visa was cancelled by immigration minister Alex Hawke, should be competing in the tournament.

A two-time champion in Melbourne, Osaka said her focus was on herself – with a second-round clash against Madison Brengle awaiting her.

"I feel like people focus on whatever they want to focus on. It's more like an individual question," Osaka said.

"Me, I'm a tennis player. I'll focus on my matches. You, as I guess an audience, focus on whatever is in the news, no?"

Rafael Nadal made a strong start to his Australian Open campaign, brushing past Marcos Giron in the opening round on Monday.

The Spanish superstar outclassed American Giron in a resounding 6-1 6-4 6-2 victory on Rod Laver Arena.

Nadal, who can claim the outright lead for most grand slams won by a man if he clinches his 21st in Melbourne, was in good form.

Playing his first major since last year's French Open, Nadal – the only former champion in the draw following Novak Djokovic's deportation from the country – was never troubled by Giron.

Nadal reeled off five consecutive games to take the opening set in 24 minutes.

His excellent first set was highlighted by two brilliant winners to break for 5-1 as he completely dominated Giron.

Nadal capitalised on his momentum by breaking in the opening game of the second set, Giron finally stopping the run by holding for 1-2.

The Spaniard maintained his lead and was forced to serve out the set, doing so to 15 to take complete control.

A backhand pass saw Nadal break again in the opening game of the third set on his way to a comprehensive win, with Thanasi Kokkinakis or Yannick Hanfmann awaiting him in the second round.

DATA SLAM: Nadal makes no mistake in opener

Only twice in his illustrious career has Nadal lost in the opening round of a grand slam – at Wimbledon in 2013 and the 2016 Australian Open.

But since his defeat to Fernando Verdasco in Melbourne six years ago, Nadal has not lost a set in the Australian Open first round, continuing that record against Giron.

WINNERS/UNFORCED ERRORS
Nadal – 34/26
Giron – 10/23

ACES/DOUBLE FAULTS
Nadal – 7/2
Giron – 2/2

BREAK POINTS WON
Nadal – 5/9
Giron – 0/2

Naomi Osaka moved into the Australian Open second round with a straight-sets victory over Camila Osorio on Monday.

The defending champion was largely untroubled by 20-year-old Colombian Osorio, easing to a 6-3 6-3 victory in 68 minutes on Rod Laver Arena.

Osaka, a four-time grand slam winner, has now won 23 of her past 24 matches in Melbourne.

It means a fourth-round showdown between Osaka and world number one Ash Barty remains on the cards.

Osaka made an imperious start and raced into a 5-0 lead after 16 minutes, on the back of eight winners, plus seven unforced errors from Osorio.

Incredibly, Osorio – who was growing in belief – had chances to get back on serve when Osaka was trying to close out the set, but the two-time champion in Melbourne managed to seal it 6-3.

The energetic Osorio was encouraging herself throughout while matching Osaka, who broke for a 2-1 lead in the second set.

In the end, Osaka proved too good despite a decent first-round test, moving into a meeting with either Dayana Yastremska or Madison Brengle.

DATA SLAM: Osaka's first-round record remains strong

Osaka is rarely troubled in the opening round of grand slams. The star is now 19-2 in the first round at majors.

Another challenge awaits. Osaka has never defended any of her major crowns and the last player to defend the women's title at Melbourne Park was Victoria Azarenka (2012 and 2013).

WINNERS/UNFORCED ERRORS
Osaka – 19/28
Osorio – 5/15

ACES/DOUBLE FAULTS
Osaka – 4/3
Osorio – 1/4

BREAK POINTS WON
Osaka – 4/6
Osorio – 1/5

Novak Djokovic's absence from the Australian Open "is a loss for the game", says men's tennis governing body the ATP.

The world number one failed in his bid to overturn a decision from the government to cancel his visa on public health grounds at the Federal Court in Melbourne on Sunday.

Djokovic, who is unvaccinated against COVID-19, will therefore be unable to participate in the Australian Open, where he was seeking a record-extending 10th title.

As the 20-time grand slam winner prepared to fly out of Australia on Sunday, the ATP released a statement reflecting on a "deeply regrettable" saga that lasted 10 days.

"Today's decision to uphold Novak Djokovic's Australian visa cancellation marks the end of a deeply regrettable series of events," the statement read. 

"Ultimately, decisions of legal authorities regarding matters of public health must be respected. 

"More time is required to take stock of the facts and to take the learnings from this situation.

"Irrespective of how this point has been reached, Novak is one of our sport's greatest champions and his absence from the Australian Open is a loss for the game. 

"We know how turbulent the recent days have been for Novak and how much he wanted to defend his title in Melbourne. 

"We wish him well and look forward to seeing him back on court soon. ATP continues to strongly recommend vaccination to all players."

Sunday's verdict brings an end to a long-running saga that began when Djokovic was held at an airport in Melbourne when he arrived in the country on January 6.

The 34-year-old won an appeal to overturn the first bid to deport him from the country, but immigration minister Alex Hawke used his powers to again cancel the visa.

That decision was taken amid much backlash in the country, which has strict coronavirus restrictions, and Australian prime minister Scott Morrison backed Sunday's verdict.

"This cancellation decision was made on health, safety and good order grounds, on the basis that it was in the public interest to do so," he said.

"I welcome the decision to keep our borders strong and keep Australians safe.

"I thank the court for their prompt attention to these issues and the patience of all involved as we have worked to resolve this issue. 

"It's now time to get on with the Australian Open and get back to enjoying tennis over the summer."

But the unanimous verdict did not go down well with everyone, with Serbian prime minister Aleksandar Vucic launching an attack on Australia for their handling of the matter.

"I talked to Novak and told him I can't wait for him to come to Serbia and return to his country, and to be where he is always welcome," Vucic is quoted as saying by Novosti.

"They think that they humiliated Djokovic, but they humiliated themselves, and he can return to his country and look everyone in the eye with his head held high."

Speaking prior to Sunday's verdict, Rafael Nadal insisted the Australian Open will be a great tournament "with or without" Djokovic.

Other big names have yet to comment on the deportation order, but women's player Alize Cornet feels Djokovic's peers could have offered more support to the Serbian.

"I know too little to judge the situation. What I know is that Novak is always the first one to stand for the players," she posted on Twitter. 

"But none of us stood for him. Be strong, Novak."

Djokovic had been due to face Miomir Kecmanovic in the opening round on Monday but will now be replaced by lucky loser Salvatore Caruso.

The ATP has confirmed that there will be no shuffling of the seeds due to Monday's schedule of playing having been released prior to the court's decision.

Novak Djokovic is "extremely disappointed" to have lost his fight to compete at the Australian Open but "respects" the decision and will not mount fresh legal action.

The world number one learned on Sunday that his second appeal to reinstate his visa had been rejected unanimously by three judges at the Federal Court in Melbourne.

Djokovic, who is not vaccinated against COVID-19, had been due to begin his latest title defence against Miomir Kecmanovic on Monday but will instead now be deported from the country.

While disappointed at the decision, the 20-time grand slam winner will cooperate with the authorities in relation to his departure from the country.

In a statement released shortly after the verdict, Djokovic said: "I will now be taking some time to rest and to recuperate, before making any further comments beyond this.

"I am extremely disappointed with the Court ruling to dismiss my application for judicial review of the Minister's decision to cancel my visa, which means I cannot stay in Australia and participate in the Australian Open.

"I respect the Court's ruling and I will cooperate with the relevant authorities in relation to my departure from the country."

Sunday's verdict looks set to bring an end to a long-running saga that began when Djokovic was held at an airport in Melbourne when he arrived in the country on January 6.

The 34-year-old won an appeal to overturn the first bid to deport him from the country, but immigration minister Alex Hawke used his powers to again cancel the visa on Friday.

That decision was taken amid much backlash in Australia, which has strict coronavirus restrictions, while some leading players have lamented how the tournament has been overshadowed by the Djokovic drama.

But after losing his latest appeal, the Serbian hopes that all focus can now be on the first grand slam of the year, which begins on Monday.

"I am uncomfortable that the focus of the past weeks has been on me and I hope that we can all now focus on the game and tournament I love," he added in his statement. 

"I would like to wish the players, tournament officials, staff, volunteers and fans all the best for the tournament.

"Finally, I would like to thank my family, friends, team, supporters, fans and my fellow Serbians for your continued support. You have all been a great source of strength to me."

Full reasons for the court's ruling will be published "in the coming days".

Djokovic could now be banned from the country for the next three years as that is the punishment that usually comes with a deportation order.

The tennis season has begun with Rafael Nadal, Ash Barty, Paula Badosa and Thanasi Kokkinakis among the champions at small-scale events in Australia.

Yet there has been one dominant story in the sport and little else has had a look-in in the lead-up to the Australian Open.

Now that Novak Djokovic knows his fate, there is the welcome prospect of eyes turning to matters on the tennis court, rather than the Federal Court.

With the action getting under way in Melbourne on Monday, Stats Perform looks at the main protagonists and what the numbers tell us about another high-stakes grand slam.

Djokovic absence blows open men's draw

As defending champion Djokovic heads for home, it is worth a reminder of how he has dominated this tournament.

Nine of his grand slam titles have come in Melbourne, and he has taken the trophy in each of the last three years, helping him cosy up alongside Roger Federer and Rafael Nadal on 20 majors, an all-time record they share. Of the 'Big Three', only Nadal is in the draw this year, with Federer currently on the injured list.

Djokovic has the highest win percentage in the Open Era (since 1969) at the Australian Open, among players with 20 or more wins (91.1 per cent – W82 L8). He was hoping to join Nadal (13 French Opens) and Margaret Court (11 Australian Opens) in the exclusive club of players to reach double figures for singles titles at one slam.

The Serb was also aspiring to become the first man in the Open Era to win four consecutive Australian Opens. It happened once before the tour turned professional, with Roy Emerson winning five in a row from 1963 to 1967. Djokovic has left Melbourne with the title every time that he has made it through to the semi-finals.

So who takes the title now?

Only Bjorn Borg (89.2 per cent) has a higher winning percentage in grand slam matches than Nadal (87.7 per cent) and Djokovic (87.5 per cent) in the Open Era, among players with 100 or more wins. So why not Nadal?

The 35-year-old and Djokovic have carved up 12 of the last 14 grand slam titles, Nadal winning four of those (three French Opens, one US Open). He is battling back from a foot injury lay-off and coronavirus, and might need to get the early rounds out of the way without undue stress to stand a chance at the business end.

The two exceptions in the Nadal-Djokovic sequence of slam dominance have come at the US Open, with Dominic Thiem winning in New York in 2020 and Daniil Medvedev triumphing at Djokovic's expense in last year's Flushing Meadows final. Thiem is not in Australia, but world number two Medvedev is, looking to become the third Russian man to win two slams, after Yevgeny Kafelnikov and Marat Safin.

The last man other than Federer, Nadal and Djokovic to secure back-to-back slam singles title was Andre Agassi (US Open 1999 and Australian Open 2000), but that is Medvedev's objective now, and he has the game to pull it off.

Nadal has reached at least the quarter-final stage in 15 of his last 16 grand slam appearances, winning six of those majors (four French Opens and two US Opens), so he may well be a factor.

Who else is in the frame? Alexander Zverev probably, having reached the quarter-finals in Australia in the last two seasons (SF in 2020 and QF in 2021). He won the Olympic Games and ATP Finals titles last year, so a grand slam is an obvious next step. He might want to keep double faults in check though, having served a tour-high 113 in slams last season.

Stefanos Tsitsipas reached the Australian semi-finals in 2019 and 2021, so throw him into the mix too, and Matteo Berrettini might be a threat. The Italian, a runner-up to Djokovic at Wimbledon in July, served more aces than any other player in grand slams last year (311 aces, 16.4 on average per match).

Others have more modest ambitions

Andy Murray is back at the Australian Open for the first time since 2019, when he lost in the first round against Roberto Bautista Agut in five sets and was more or less given his last rites as a tennis pro after the match, having indicated he was close to retirement.

The five-time Australian Open runner-up last won a match in this tournament in 2017, when he reached round four. A tough opener against Nikoloz Basilashvili awaits.

Spanish 40-year-old Feliciano Lopez will make his 80th appearance in a grand slam and become the second man in the Open Era with 80 or more appearances at the four majors, after Federer (81).

Do not expect an Australian to be men's champion, by the way. The last time an Australian reached the men's singles final was 2005, when Lleyton Hewitt lost against Safin, and the last home champion was Mark Edmondson in 1976.

Barty backed in stacked women's draw

For the first time since 1997, neither Serena nor Venus Williams will take part in the Australian Open. Yet the women's tour is in rude health, even without those great bastions.

Ash Barty is world number one and a standout pick for many, only enhancing her claims after winning an Adelaide International title in the run-up to this fortnight.

But there is staggering depth on the women's side at present, and Barty will face stiff competition.

Incredibly, the last five grand slam finals have featured 10 different women, and teenager Emma Raducanu's against-all-odds US Open triumph in September shows best of all that new stars are emerging.

Yet since 2000, only three non-seeded players have reached the women's singles final at the Australian Open: Serena Williams in 2007, Justine Henin in 2010 and Garbine Muguruza in 2020. 

Barty could become the first Australian to be women's champion since Chris O'Neil in 1978, and the first to reach the final since Wendy Turnbull lost to Hana Mandlikova in 1980.

The Queenslander is the top seed, and the last time the number one failed to reach at least the fourth round at Melbourne Park was in 1979, when Virginia Ruzici lost her opening match. Barty ended a long wait for an Australian winner of the women's title at Wimbledon last year, so why not closer to home as well?

Naomi Osaka is back, so what should we expect?

Truth be told, that's hard to know. Osaka took time out from tennis after the US Open to focus on her mental health and enjoyed hanging out with friends, before deciding she missed tennis enough to go back on tour.

She had three wins at the Melbourne Summer Set tournament recently before withdrawing from a fourth match, saying her body had "got a shock" from the intensity. As defending champion in the season's first major, she has a target on her back and will need to find a way to handle that.

Over the past six seasons, only Osaka has managed to win back-to-back grand slam singles titles among the women, and she has done so twice (US Open 2018 and Australian Open 2019, plus US Open 2020 and Australian Open 2021).

The last player to win back-to-back women's Australian Open singles titles was Victoria Azarenka (2012 and 2013), so it does not happen regularly.

Osaka has an 85 per cent win rate at this tournament: since 2000, only Jennifer Capriati (90 per cent) and Serena Williams (89 per cent) have had a higher win percentage in the main draw.

You want challengers to the big two? Try sticking a pin in the draw

The Daphne Akhurst Memorial Cup, which goes to the champion, is a trophy that upwards of a dozen women will seriously believe they can win.

Aryna Sabalenka has reached the semi-finals of the last two slams but is mired in some kind of hellish serving groove, having made 74 double faults in her last four matches and lost the last three in a row.

Anett Kontaveit won a tour-high 39 matches on hard courts last year but has only been to one grand slam quarter-final – last year in Australia, losing to Simona Halep.

What about Ons Jabeur, who matched Kontaveit for a tour-high 48 wins across all surfaces last year? The Tunisian is queen of the drop shot, making 147 successful such plays on tour last year, more than any other player, and recently reached the top 10 in the WTA rankings for the first time.

Maria Sakkari reached two slam semi-finals last year, the first of her career, and the form of Barbora Krejcikova and Badosa in the past week in Melbourne marks them out as contenders. Both are recent fast-risers, Krejcikova already with a French Open title to show.

WTA Finals champion Muguruza could be the second Spaniard to twice reach the Melbourne title match, after Arantxa Sanchez Vicario (1994 v Steffi Graf and 1995 v Mary Pierce). Spain has never had an Australian Open women's singles winner: former French Open and Wimbledon champ Muguruza is an authentic contender.

Halep was runner-up to Caroline Wozniacki in 2018, a semi-finalist in 2020 and quarter-finalist last year, and a Melbourne Summer Set title was a handy warm-up for the Romanian. Consider her, too.

Monica Seles, in 1991, was the last player to triumph on her debut in the main draw, but she was already a grand slam winner (1990 French Open). Given the strength of the line-up, the prospect of a bolter coming through this field is unlikely, even if the example of Raducanu tells us anything is possible.