World number one Novak Djokovic is in favour of technology replacing linespeople across the ATP Tour amid the absence of judges at the Australian Open.

This year's Australian Open is being held without line judges 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 linespeople with technology as the tournament seeks to limit the number of people on court amid the COVID-19 pandemic.

Djokovic was sensationally disqualified in the fourth round of last year's US Open for inadvertently hitting a ball at a line judge during his clash with Pablo Carreno Busta in New York.

Asked about the situation at the Australian Open, defending champion and eight-time winner Djokovic told reporters: "I think back [at the] US Open last year, someone asked me whether I would support the idea of introducing this kind of line call technology at every tournament.

"Obviously providing that the tournament is able to afford financially that kind of investment, because obviously it is an investment.

"I said that I support that, because I feel, yes, I understand that there is a tradition and history and the way we kind of got used to the line umpires being there, and I think it's nice that there is a lot of people and also volunteers with these line umpires that love tennis and love to have an opportunity to be out on the court and be close to the players and be part of a great event.

"But I think when you draw a line that generally I actually am in favour of technology. I think it's proven to be very accurate in this particular instance.  I don't see a reason why we need the line umpires, to be honest, if we have technology like this. I would of course keep the ball kids, but line calls I'm in favour of this technology."

Djokovic was speaking after beginning his quest for a ninth Australian Open title with a 6-3 6-1 6-2 win over Jeremy Chardy on Monday.

The 17-time grand slam champion is trying to close the gap on 20-time major winners Roger Federer - who is absent from this year's event - and Rafael Nadal.

"I respect all of my opponents' records. I think especially Roger and Rafa, what they have achieved over the years. They are legends of our sport, and I admire them a lot," Djokovic said. "They have positively affected my game and my growth, my development and all my success. Wouldn't be what it is if these two guys were not there.

"I have had tremendous rivalries with these two guys and we still keep on going. But I don't want any of their success, if you know what I mean. I'm not jealous of their success or anything like that. I try to build my own authentic career and my own success, and I stick to that."

Djokovic added: "I am always motivated and inspired to achieve big goals and break records. I would lie if I say that's not, you know, something that I'm thinking about or that my attention is not going that way.

"I have been very transparent about the fact that one of the biggest goals is to try to reach the number one of all time weeks' record, and I'm getting closer and closer to that one. That's a kind of a lifetime achievement for me. 

"Grand slams, as well. Of course the Masters events, I think the 1000 events over the years I have managed to be very consistent and win a lot of titles there. Those are the biggest events that we have on the four other than grand slams.  The head-to-head records with top guys as well, to name a few. I try to be a good student of the game. 

"I'm just very fortunate to be in this situation and position that I'm in at the moment, so I try to keep on going and obviously setting up new goals for myself, because I feel like other than passion and love that I have for the game and the biggest reason why I still play it is exactly that pure emotion that I have of enjoyment when I'm there and excitement.

"As a professional tennis player, I need to have goals. Over the last 15 years, everything that I have managed to achieve, I don't settle for anything less but the top of the men's game and the biggest trophies.  That's something I always aim for. I work towards that.  And yeah, I'm still lucky to be where I am. Let's see what the future holds."

Novak Djokovic began his quest for a ninth Australian Open title with a convincing straight-sets win over Jeremy Chardy.

The reigning champion and world number one looked in ruthless form as he won 6-3 6-1 6-2 in a little over an hour and a half.

Djokovic, who beat Dominic Thiem in a five-set thriller in the 2020 final, was in an authoritative mood as he took the first two sets in just 56 minutes.

Chardy, whose best grand slam result was reaching the quarter-finals in Melbourne in 2013, offered some valiant resistance in game five of the third set before Djokovic eventually claimed the crucial double break.

The 17-time major winner eased through the final two games in front of a jubilant crowd, finishing with back-to-back aces to set up a second-round match with Frances Tiafoe.

"It makes my heart full to see the crowd in a stadium again," said Djokovic, who has reached at least the semi-final stage in seven of his previous nine majors.

"There's an ongoing love affair between me and the Rod Laver Arena. It's definitely one of the most special courts on the tennis tour around the world and my most successful. Every time I step on this court, I relive those memories."

Djokovic's preparations for the tournament were overshadowed by a row over quarantine conditions for players arriving in Australia, the 33-year-old having lobbied Tennis Australia and state authorities to loosen restrictions for 72 players who had to spend two weeks in their hotel rooms.

There was little about his performance on Monday to suggest any distractions from the task at hand, although he bristled a little in the on-court interview when it was put to him he had been "frustrated" in recent weeks.

"I'm just really glad we're free, playing tennis, back in Australia," he then said. "It's a happy place for us, a happy slam."

Data Slam: Djokovic at his clinical best

Djokovic dropped just nine points on serve and hit 41 winners to just 11 unforced errors, sending down nine aces and one double fault.

Such imperious play left Chardy, who had lost all 13 of their previous encounters, with little chance of an upset.

WINNERS/UNFORCED ERRORS
Djokovic – 41/11
Chardy – 20/26

ACES/DOUBLE FAULTS
Djokovic – 9/1
Chardy – 3/3

BREAK POINTS WON
Djokovic – 6/13
Chardy – 0/0

Rafael Nadal is "doing everything possible" to play a part in the Australian Open after suffering from back pain for the past two weeks.

The 34-year-old pulled out of Spain's line-up for the ATP Cup earlier this week and was last in competitive action in November's ATP Finals.

Nadal is due to face Laslo Djere in the first round on Tuesday as he seeks a second Australian Open title, but the Spaniard cannot guarantee he will be able to play the match.

"It's not great, obviously," he said. "It's true that for the last 15 days I have been suffering.

"In the beginning, the muscle was just a little bit tired, but I now feel a little bit more stiff than usual.

"The muscle is still tight, so it is difficult to play with freedom of movement."

But Nadal, who has a history of back injuries, is refusing to withdraw from the tournament.

"I have Monday and then playing Tuesday. I don't think about not playing," he said.

"We are doing everything. My physio is here, the doctors [are] here, everybody is helping me in all possible ways. I hope to be ready, that's all. I know sometimes things change quick."

Nadal is not alone in entering the first grand slam of the year below full strength, with the likes of Serena Williams, Sofia Kenin and Naomi Osaka also battling injury problems.

However, the world number two will not use his niggling back issue as an excuse should he suffer an early exit at Melbourne Park.

"I'm not a big fan of finding excuses," he said. "When things happen, you need to find a way to get through."

Nadal can surpass Roger Federer for all-time majors should he triumph at the Australian Open.

He is also looking to become only the second man after Rod Laver to win each major on more than one occasion in the Open era, but his only previous success at the tournament came 12 years ago.

"I think I had the big chance in 2014. I got injured during the match on the back. It was tough," he said.

"I had another good chance in 2012, another good chance in 2017 with a break up in the fifth. I just didn't win the match. 

"That's all, I can't find another reason. It is true that I missed a couple of Australian Opens for injuries, too."

World number four Daniil Medvedev clinched ATP Cup success for Russia, who defeated Italy in Melbourne on Sunday.

On the eve of the Australian Open, Medvedev boosted his preparations by guiding Russia past Italy thanks to a 6-4 6-2 victory over Matteo Berrettini at Melbourne Park.

It was a dominant display from Russia, who won all eight singles matches they played in the ATP Cup, after Andrey Rublev overpowered Fabio Fognini 6-1 6-2 in the second matchup.

"I want to thank my team. Andrey won all of his matches," Medvedev said. "Thank you for being with me here and lifting this trophy in a few moments."

Medvedev heads in Monday's Australian Open in red-hot form, having won a personal-best 14 successive matches, dating back to the start of last year's Paris Masters.

Of those victories, 10 have come against top-10 opponents as 2019 US Open runner-up Medvedev – seeded fourth for the year's first grand slam – prepares to face Vasek Pospisil on Tuesday.

"It's a really big achievement because I also didn't lose a match. Yeah, 10 matches against Top 10 opponents, didn't lose a match in these 10 matches. It's a big boost in confidence," Medvedev said.

"Even when you lose, you know that you're capable of playing this level, and it helps you for the next time to stand up."

While Italy did not taste team success, Jannik Sinner claimed the Great Ocean Road Open on Sunday.

Sinner overcame countryman Stefano Travaglia 7-6 (7-4) 6-4 to earn his second title following the first all-Italian ATP Tour final since 1988.

The 19-year-old Sinner is the youngest player to win two ATP Tour titles since world number one Novak Djokovic (19) in 2006, while he is also the youngest player to celebrate back-to-back trophies since 20-time grand slam champion Rafael Nadal (19) in 2005.

Elsewhere, eighth seed Daniel Evans defeated Canadian sensation Felix Auger-Aliassime 6-2 6-3 to claim his first tour-level title.

Evans became the first Brit to win an ATP Tour title since Kyle Edmund at the New York Open last February.

World number one Novak Djokovic said he does not have "much respect" for outspoken Australian star Nick Kyrgios away from the tennis court.

Kyrgios has been critical of Djokovic in an ongoing feud with the 17-time grand slam champion, who was labelled a "tool" by the former following a list of requests made to Tennis Australia (TA) and the Victorian government for tennis players stuck in hotel quarantine amid the coronavirus pandemic.

Former world number 13 Kyrgios was also critical of Djokovic's decision to stage the Adria Tour in Europe last August – in the midst of the COVID-19 crisis – having previously dubbed the Serb star "cringeworthy".

Djokovic rekindled his rivalry with Kyrgios after being asked about the 25-year-old on the eve of the Australian Open.

"I've said this before," Djokovic told reporters on Sunday. "I think he's good for the sport. Obviously he's someone that is different. He goes about his tennis, he goes about his off court things in his own authentic way. 

"I have respect for him. I have respect for everyone else really because everyone has a right and freedom to choose how they want to express themselves, what they want to do. My respect goes to him for the tennis he's playing. I think he's very talented guy. He's got a big game. He has proven that he has a quality to beat any player really in the world in the past.

"Off the court, I don't have much respect for him, to be honest. That's where I'll close it. I really don't have any further comments for him, his own comments for me or anything else he's trying to do."

Djokovic has won the past two Australian Open finals as he eyes a record-extending ninth Melbourne Park crown.

The 33-year-old, who opens his title defence against Jeremy Chardy on Monday, has won the Australian Open every time he has reached the semi-finals.

Djokovic has reached at least the semi-finals in seven of his last nine grand slam tournaments, winning five of them.

No male has won more Australian Open men's singles titles than Djokovic, who said: "It's a love affair. Probably something similar maybe not like Rafa [Nadal] has with the French Open, but I've been feeling more comfortable on the court each year that I've been coming back. 

"The more you win, obviously the more confidence you have and the more pleasant you feel on the court. It just feels right. If you're in the right state of mind, regardless of the surface, you have a better chance to play at your best.

"When I stepped on the court this year for the first time in the practice session, I relived some of the memories from last year, also the other years that I won the tournament here.

"It just gives me great sensation, great feeling, confidence. It feels right. It feels like the place where I should be and where I have historically always been able to perform my best tennis. Hopefully can be another successful year."

Asked if he still feels nerves, Djokovic – who is looking to close the gap on Rafael Nadal and Roger Federer (both 20) for the most slam trophies – added: "Every match, every match. Every single match. I don't want to speak on behalf of the other athletes, but I just feel like it's almost impossible to eliminate that kind of pressure, anticipation, the nerves coming into any match really for an athlete. At least in my case.

"It's just that I managed over the years to train myself, I think with the experience and with also the dedication that I had off the court to the mental preparation, that helped me react better to those kind of emotions. Sometimes I don't manage to overcome the pressures and the stress and nerves. Sometimes I do. It really just depends. Even though I've been blessed to experience a lot of success, especially here in Australia, but also in my career. I still feel that those failures, if you want to call them that way, even though I don't believe in failures, I just believe in opportunities to improve, kind of the lessons to be learned, but in those matches you lose, big matches, that's where you learn the most.

"That's where you're facing the kind of wall mentally. You're upset. You have a lot of different things happening, and you feel like you let yourself down. That's where it's the biggest opportunity for you to really address that and become stronger, more capable. You can get to know yourself a little bit on deeper levels. It still happens to me.

"Every single tournament, regardless of my previous success, of course I do feel that I have more confidence, more experience, maybe more training in understanding how to deal with these specific situations when I'm coming on the big court, being expected to win 99 per cent of the matches that I play.

"But it's still there. It's still there. I don't think it's ever going to go away. Especially when the occasion is big, when you're playing for the biggest trophies."

Daniil Medvedev won a marathon match against Alexander Zverev to send Russia into the final of the ATP Cup for the first time.

The world number four and reigning ATP Finals champion triumphed 3-6 6-3 7-5 at Melbourne Park in a match lasting just under two hours and 40 minutes.

That result clinched victory over Germany in the semi-final after Andrey Rublev had earler fought back in style from a set down to defeat Jan-Lennard Struff 3-6 6-1 6-2.

"We're really happy to get the win, that's the most important [thing," Medvedev said. "Tough matches [for] both of us. Both [Andrey and I] lost the first set. [It was] not easy, because we had two days off before the match. But happy we're in the final. That's the most important."

Zverev appeared in control after breaking to go 3-2 ahead in the second set after winning the first, but Medvedev reeled off four games in a row as the world number seven began to struggle with a lower back problem.

"When it's against Sascha and you are 6-3, 3-2, break down, many times you're going to lose a match," Medvedev said. "But I needed to keep my chances alive for the team first of all, for the country. I just tried to stay there, got a bit tight maybe. I just did my job and I'm really happy about it."

Russia will meet Italy in the final following their defeat of Spain, which was secured by Matteo Berrettini's straight-sets win over Roberto Bautista Agut.

After Fabio Fognini saw off Pablo Carreno Busta in three sets, Berrettini - who has beaten three of the top 13 players in the world without dropping a set in this tournament - won 6-3 7-5 to set up Sunday's Russia showdown.

"It's an unbelievable feeling," said a delighted Berrettini, who was absent last year as Italy failed to progress from their group in the inaugural staging of the event. "Last year I couldn't make it, so I'm really happy that the first time that I played we are into the final.

"I'm feeling good. I'm feeling pumped. I'm feeling great to play not just for me, but for my team and for Italy in general. That's what matters the most. I'm really looking forward to playing tomorrow."

SINNER TO FACE FAMILIAR FOE

There will be an all-Italian affair in the final of the Great Ocean Road Open, with Jannik Sinner to face Stefano Travaglia.

In-form Sinner clinched an impressive 7-6 (7-4) 4-6 7-6 (7-4) win over second seed Karen Khachanov, in a three-hour battle, after his compatriot beat Thiago Monteiro 6-3 6-4.

At the Murray River Open, Felix Auger-Aliassime will meet Dan Evans in the final as each look to secure a first ATP Tour title.

Auger-Aliassime needed only 61 minutes to beat Corentin Moutet, while eighth seed Evans required a minute less to ease past Jeremy Chardy.

Rafael Nadal has history in his sights, but Novak Djokovic stands in his way at an Australian Open he has almost made his own.

With Roger Federer absent from the year's first grand slam, all eyes in the men's draw will be on Nadal and Djokovic.

As the fight between the 'Big Three' continues as to who will finish their career with the most majors, Melbourne shapes as again playing a key part, particularly amid the ongoing uncertainty due to the coronavirus pandemic. After winning his 13th French Open last year, the equation is simple for Nadal. His success at Roland Garros drew him level with Federer on 20 majors, the most by a man all-time.

But with the GOAT debate sure to continue for decades to come, a second title in Melbourne would also lift the Spaniard into uncharted territory. Nadal has the chance to become the first man in the Open Era to win every grand slam at least twice. Federer and Djokovic are both missing a second crown at Roland Garros.

For all his dominance in Paris, that would add another feather to the cap for 34-year-old Nadal. Most of Federer's major success has come at Wimbledon (eight titles), while Djokovic's has been at the Australian Open (also eight titles) – both establishing men's records at those tournaments. Nadal has been runner-up four times in Melbourne since his only title in 2009, while he has reached at least the quarter-finals in the past four years.

But just as Nadal, who is dealing with a back injury ahead of the tournament, stands in the way at the French Open, he will need to get past Djokovic – or have some luck – in Australia.

The Serbian has a 75-8 win-loss record at the tournament, including winning the past two titles. He has won the crown every time he has reached the semi-finals. Djokovic's previous blip in Melbourne came in 2017 and 2018, surprisingly beaten by Denis Istomin (second round) and Chung Hyeon (fourth round) respectively.

A year younger than Nadal, Djokovic is a 17-time grand slam champion, and he has made no secret of his desire to hold the record for most majors won by a man. Djokovic and Nadal have claimed nine of the past 10 majors, although the other one came recently as Dominic Thiem clinched last year's US Open, where the Spaniard and Federer were absent.

With preparations impacted by COVID-19, perhaps Thiem, Daniil Medvedev, Stefanos Tsitsipas, Alexander Zverev or Andrey Rublev could threaten as the wait goes on for a changing of the guard in men's tennis.

But all eyes are unsurprisingly on Nadal and Djokovic as history again beckons.

Novak Djokovic said it was "a tough one" to take after Serbia's hopes of retaining the ATP Cup title were ended by defeat to Germany.

The world number one scored a tense 6-7 (3-7) 6-2 7-5 victory over Alexander Zverev in their singles rubber, levelling the match after Jan-Lennard Struff beat Dusan Lajovic in three sets.

Zverev and Struff then teamed up in doubles to net a 7-6 (7-4) 5-7 10-7 win over Djokovic and Nikola Cacic.

The singles workout and win sets up the eight-time Australian Open champion well for the start of that grand slam next week, which was the consolation Djokovic could take from defeat.

Speaking about his singles clash with Zverev, Djokovic said: "It was anybody's game really. He was a set up, a couple points here and there in the beginning of the second. I just returned well when I needed to and closed out the match.

"It's never easy playing against Sascha [Zverev] when he's in form, and he's in really good form. We pushed each other to the very limit, and I'm glad that I had such a battle with him.

"It's unfortunate we lost the tie. That's what this competition is all about. It's about the team, not about winning one match, a singles match. Yeah, it's a tough one."

Germany advance to face Russia in the semi-finals on Saturday, with Daniil Medvedev and Andrey Rublev a formidable combination awaiting them.

Spain secured a shot at Italy in the second semi-final, despite a 2-1 defeat to Greece on Friday.

The Spanish team needed just one win in the group-stage match to advance, and that predictably came as Pablo Carreno Busta, ranked 16th by the ATP, beat world number 462 Michail Pervolarakis.

His 6-3 6-4 success could not be matched by team-mate Roberto Bautista Agut, who fell to a 7-5 7-5 defeat against Stefanos Tsitsipas, while Spain retired from the doubles rubber after one game, giving Greece a 2-1 success in the tie.

It remains to be seen whether Rafael Nadal will be fit to play any part in the semi-final, with the 20-time grand slam champion having been absent so far in the campaign due to a back injury.

"He's working very hard to recover his best feelings," said Spain captain Pepe Vendrell.

"Obviously he couldn't play any matches during the week. It's a situation that we have to study. But day by day he's improving. We will see [on Saturday] if he can play."

AWAY FROM THE ATP CUP, WAWRINKA ABANDONS

In the Murray River Open, Stan Wawrinka withdrew from his quarter-final with Jeremy Chardy after beating Australian Alex Bolt in a tough three-set match earlier in the day. Corentin Moutet, Dan Evans and Felix Auger-Aliassime joined Chardy in the last-four line-up.

Evans defeated Borna Coric, who had eliminated Australian hope Nick Kyrgios in his previous match.

All ATP and WTA tournaments are being played at Melbourne Park this week.

Thursday's play was cancelled due to a COVID-19 case affecting a worker from a hotel that accommodated quarantining players, and that meant Friday's schedule was packed.

The Great Ocean Road Open also saw players needing to win two matches in a day to reach the semi-finals, with Karen Khachanov, Thiago Monteiro and the Italian pair of Jannik Sinner and Stefano Travaglia coming through.

Australian Open champion Novak Djokovic could face Dominic Thiem in a mouth-watering semi-final after being handed a tough path to success at Melbourne Park, where Serena Williams will continue her quest for a 24th grand slam singles title.

The Australian Open draw took place on Friday, with world number one Djokovic set to play Frenchman Jeremy Chardy in the opening round of the year's first major tournament.

Amid coronavirus concerns in Melbourne, where Swiss great Roger Federer is absent, Djokovic has set his sights on a ninth crown and 18th major success, but the top seed's title defence is far from straightforward.

Djokovic could face Gael Monfils (fourth round) and sixth seed Alexander Zverev (quarter-final) en route to a possible semi-final against US Open champion and third seed Thiem.

The Serb overcame Thiem in a five-set thriller in last year's Australian Open final, before the latter broke through for his maiden major trophy at Flushing Meadows.

Djokovic could then meet second seed and 20-time major champion Rafael Nadal in a blockbuster final – he blitzed the Spanish superstar in the 2019 Australian Open decider but lost in three one-sided sets in their previous meeting in the French Open final.

Nadal will go head-to-head with another Serb in the first round – Laslo Djere – while Stefanos Tsitsipas could await in the quarters, with 2019 US Open final opponent Daniil Medvedev also on the same side of the draw.

Meanwhile, Williams' bid for a record-equalling 24th slam will begin against German Laura Siegemund.

The 39-year-old Williams has been stuck on 23 majors since winning the Australian Open in 2017 – losing finals at Wimbledon (2018 and 2019) and the US Open (2018 and 2019).

World number one and local hope Ashleigh Barty will meet Montenegro's Danka Kovinic in round one and defending champion Sofia Kenin faces Australian wildcard Maddison Inglis.

The last 16 could see Williams clash with Aryna Sabalenka, Barty meet Petra Martic, Kenin tackle Johanna Konta and three-time major champion Naomi Osaka do battle with last year's runner-up Garbine Muguruza.

Australian Open tournament director Craig Tiley said there were no plans to change the schedule for the major amid coronavirus concerns.

More than 500 players and officials were forced into isolation after a worker at an Australian Open quarantine hotel tested positive for COVID-19.

It led to play at lead-up events in Melbourne on Thursday being called off and sparked fears around the year's first grand slam, which is scheduled to begin on Monday.

But Tiley is hoping play is back underway on Friday and said he expects the Australian Open to start as scheduled.

"The intention is to start the Australian Open on Monday so there's no intention of changing the time for the Australian Open," he told a news conference.

Tiley added: "We're absolutely confident the Australian Open is going to go ahead.

"We know that we've got a period now that we've got to work through with those 507 players and their staff, 160 players actually, that need a test and we fully expect the probability is very low that there's going to be any issue.

"We fully expect them all to test negative and then we continue with play tomorrow like we originally planned and if we have to go through this again we'll continue to go through this again and we've got another three and a half weeks of tennis, we've got a lot of tennis to play and fully expect to keep the original schedule once we get past today."

The draw for the Australian Open was pushed back to Friday, while crowds are still expected to be in attendance for the major.

Preparations for the Australian Open were dealt a fresh blow on Wednesday when a member of hotel staff tested positive for coronavirus, although Victoria's premier insists the tournament is not under threat at this stage.

A 26-year-old worker at the Grand Hyatt Hotel returned a negative test at the end of his previous shift on January 29 but subsequently developed symptoms and tested positive on Wednesday.

As a result, Melbourne and the wider Victoria region has reverted to its New Year's Eve restrictions of gatherings at home being limited to 15 people and masks having to be worn in public indoor spaces.

In terms of the specific impact upon participants in the Australian Open, players, officials and support staff who were staying at the hotel during this period must now isolate and undertake a COVID-19 test.

The number of tournament-related personnel classed as "casual contacts" related to the incident is estimated to be between 500 and 600.

Nevertheless, Victorian premier Daniel Andrews told a news conference he was confident the Australian Open would go ahead as planned, even though the requirement that some players isolate and test could have an impact upon warm-up tournaments that are ongoing at Melbourne Park.

"There's about 500-600 people that are either players and officials and others who are casual contacts," Andrews said.

"They will be isolating until they get a negative test and that work will be done tomorrow so it might have an impact on tomorrow's play in the lead-up event, but at this stage there's no impact to the tournament proper.

"That's important to us, but the issue we're most focused on is much broader. That's about public health and public safety and that's why we've really pounced on this."

The Australian Open is scheduled to run from February 8-21.

Daniil Medvedev and Andrey Rublev produced ruthless performances as Russia cruised into the ATP Cup semi-finals.

Russia followed up their day-one win over Argentina with victory against Japan to ensure they will finish top of Group D.

Rublev got things rolling with an emphatic 6-1 6-3 win over Yoshihito Nishioka and Medvedev dispatched Kei Nishikori in a 6-2 6-4 triumph.

Those results meant the subsequent doubles match – which Japan won – would not be relevant.

"I am really happy for the team," said ATP Finals champion Medvedev, who has now won 12 matches in a row on the tour.

"Reaching the semi-finals is a big step – I am really happy that we made it in both singles. Both matches were straight sets, so really happy for the team and hopefully we can go further than that."

Italy, who had beaten Austria on the opening day, are also through after Fabio Fognini and Matteo Berrettini earned wins in straight sets over France duo Benoit Paire and Gael Monfils on Wednesday.

France play Austria next but neither team can catch Italy in Group C.

Alexander Zverev won a thriller against Denis Shapovalov 6-7 (5-7) 6-3 7-6 (7-4) to ensure Germany defeated Canada.

It was a first win at the ATP Cup for US Open runner up Zverev, who had a miserable tournament in 2020.

That sets up a day three contest for Germany against Novak Djokovic and Serbia where the winning team will progress to face Russia.

KYRGIOS AND WAWRINKA THROUGH

Nick Kyrgios – playing his first tournament for a year – made it two wins from two at the Murray River Open, defeating fellow Australian Harry Bourchier 6-2 7-6 (9-7).

First seed Stan Wawrinka survived a scare before prevailing against Mikhail Kukushkin to win 4-6 6-3 6-1 in just under two hours.

Wawrinka will take on Alex Bolt in the last 16, while Kyrgios should be tested against fourth seed Borna Coric.

At the Great Ocean Road Open, top seed David Goffin crashed out as world number 146 Carlos Alcaraz celebrated a shock 6-3 6-3 victory.

Karen Khachanov and Jannik Sinner were among the seeds who progressed, both winning without dropping a set.

Roger Federer is aiming to make his return to the ATP Tour at the Qatar Open, while Rafael Nadal is contending with a back injury with less than a week until the Australian Open.

Swiss maestro Federer has not played since losing in the semi-finals at Melbourne Park to Novak Djokovic in 2020 having undergone knee surgery last year.

The 20-time grand slam champion opted not to play in Australia this year but is aiming to return in Doha in March.

"I want to celebrate great victories again. And for that I am ready to go the long, hard road," Federer, a three-time champion at the tournament, said in an interview with SRF.

"I wanted to make my comeback at a smaller tournament so that I wasn't fully in focus and where the stress is also a little less."

Federer said it "hurts" to miss out in Australia but still has lofty ambitions at Wimbledon, the Olympics and the US Open in 2021, while saying he will attempt to play on clay this year.

"I'll try to play on clay again. The whole thing, of course, with regards to Halle, Wimbledon, the Olympics and the US Open," he added.

Federer's on-court rival Nadal matched the Swiss for most grand slam singles titles won by a male player after winning the French Open last year.

But his chances of going one better may be hindered by a back issue that forced the Spanish great to sit out his country's ATP Cup opener against Stefanos Tsitsipas on Tuesday.

"Hi all, we have decided with #TeamSpain and my team, to not play today the first match of the @ATPCup here in #Melbourne since I have a stiff low back. Hopefully I'll be better for Thursday," Nadal posted on Twitter.

Rafael Nadal wants to play at the Olympics but the star said fitting more quarantining into the ATP Tour calendar looked "difficult".

After being postponed last year due to the coronavirus pandemic, the Games are scheduled to start in Tokyo on July 23.

Naomi Osaka said she would be willing to quarantine ahead of the Olympics, with players having gone through similar in preparation for the Australian Open.

Nadal, an Olympic gold medallist in singles and doubles in 2008 and 2016 respectively, said he would listen to the experts, but acknowledged quarantining could be tough.

"It's the same as always. I am nobody to have a clear opinion on that.  I am just a tennis player, a human person that doesn't have enough knowledge about all the situation," the Spanish star told a news conference on Sunday.

"What we have to do is just follow the instructions of what the people who really have the right knowledge of all this stuff give to us. What's going to happen in Tokyo for the Olympics, if the Olympics are going to happen or not, or if we have to do quarantine before Olympics for 15 days or not, seems like a sports perspective very difficult because it's difficult for us, I don't know, combining our Tour with another 15 days of quarantine to play Olympics. It looks difficult to fix it in our calendar.

"But, as I said, we're going to do what the people who know about virus and who know about protecting the people in every single country, [we] are going to just follow their instructions."

Asked if his intention was to go, Nadal said: "I think everybody wants to play in Olympic Games, then let's see what's going on."

Nadal and Spain will begin their ATP Cup campaign against Australia on Tuesday.

The Australian Open is set to welcome up to 30,000 spectators each day when the tournament begins on February 8 in Melbourne.

Local officials have given the go-ahead for fans to head to Melbourne Park, predicting a near-normal atmosphere when action begins at the year's first grand slam.

Last year's US Open was contested behind closed doors in New York, while only 1,000 paying fans were allowed at Roland Garros on each day of the 2020 French Open.

However, the COVID-19 crisis has been tightly managed in Australia, to the point where it was reported on Saturday that there had been no new local cases in the state of Victoria for 24 days.

The crowds will be split between day and evening sessions, and the number of fans allowed will drop to 25,000 for the final six days of the tournament, when fewer courts will be in operation.

Saturday's announcement means the event will be capped at around 50 per cent of capacity.

Tournament director and Tennis Australia chief executive officer Craig Tiley said it had taken "a massive team effort" to accommodate the arrival of around 1,000 players and officials into the country, with all required to spend two weeks in quarantine.

Victoria sports minister Martin Pakula said on Sky News Australia: "On Rod Laver Arena, as we get towards the end of the tournament, we'll have an incredible atmosphere – not that different to the atmosphere we've seen in all the Opens in the years past.

"That's really a testament to the work Victorians have done to get our numbers to zero but also the extraordinary work that Craig and the team at Tennis Australia has done."