Novak Djokovic has pulled out of this week’s ATP Cup in Sydney, organisers said yesterday, heightening doubts over whether he will defend his Australian Open title.
There has been intense speculation as to whether he will travel to Australia, having refused to confirm if he has been inoculated against the coronavirus.
“World No 1 Novak Djokovic has withdrawn from the 2022 ATP Cup,” organisers said in a statement ahead of Saturday’s start to the team tournament.
“Team Serbia will now be led by world No 33 Dusan Lajovic.”
Djokovic, the nine-time Australian Open champion, could win a record 21st Grand Slam title if he plays at Melbourne Park next month, but to enter Australia he and members of his entourage have to be vaccinated.
He has previously expressed his opposition to the vaccine and his father Srdjan said in late November that Djokovic would probably not play the first Grand Slam of the year, accusing the organisers of “blackmail”.
Djokovic has been named in the entry list for the Australian Open, which starts on January 17, but he could yet withdraw. He was also originally on the entry list for the ATP Cup. 
Tennis Australia has organised charter flights to bring international stars into Melbourne and Sydney.  Defending women’s Australian Open champion Naomi Osaka was among those to touch down on Tuesday, but Djokovic was not on board. Players can also opt to fly commercial. The ATP Cup has been hit by several withdrawals - either because of Covid or injury - and as a result France will replace Austria in Group B after Dominic Thiem and Dennis Novak pulled out, organisers said yesterday. 
France had not initially met the criteria to participate in the international outdoor hard court men’s tournament between competing nations. “France has become a late addition to the 16-country 2022 ATP Cup, replacing Austria in Group B following the withdrawals of Dominic Thiem and Dennis Novak,” read a statement on the tournament website. Captained by Nicolas Copin, the French team will include 35th ranked Ugo Humbert, Arthur Rinderknech, ranked 58, and doubles specialists Edouard Roger-Vasselin and Fabrice Martin.
Thiem, ranked 15, pulled out of the Australian tournament as he recovers from a wrist injury.
Team Russia’s Andrey Rublev, who has Covid, Aslan Karatsev and Evgeny Donskoy have also withdrawn, the ATP Cup said, as has the USA’s Austin Krajicek.
Covid looks set to cast a dark shadow over the Australian Open and the raft of tournaments in the country beforehand.
Spanish superstar Rafael Nadal, who was due to play a warm-up event in Melbourne next week, was among several players to have contracted the virus at an Abu Dhabi exhibition tournament this month. His Abu Dhabi opponent, Wimbledon semi-finalist Denis Shapovalov, also later tested positive.
Three female players at the same event also tested positive - Olympic gold medallist Belinda Bencic, US Open champion Emma Raducanu and Wimbledon quarter-finalist Ons Jabeur.
Earlier Wednesday, Nick Kyrgios urged Nadal and Djokovic to play at the Australian Open, saying it would be a “disaster” if the ‘Big Three’ were missing.
Swiss ace Roger Federer has already pulled out as he recovers from a knee injury and Nadal’s plans are unclear. The dominant ‘Big Three’ have won 20 Grand Slam titles each and Kyrgios said tennis still needs them, starting in Melbourne next month.
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