Serena Williams took her daughter to the zoo and Novak Djokovic walked barefoot in a park as the stars of tennis emerged from a fortnight of quarantine ahead of the coronavirus-delayed Australian Open Friday.

Nick Kyrgios has likened Novak Djokovic to NBA player LeBron James in his influence both on and off the court but says he had a duty to call out the world number one when he "lost his way" during the COVID-19 pandemic.

Andy Murray's participation in the Australian Open is in doubt after it was announced on Thursday he had tested positive for coronavirus.

Tennis' top stars will quarantine in Adelaide rather than Melbourne and play an exhibition there ahead of the Australian Open, with the city also hosting a WTA event after the years' first Grand Slam, organisers said Saturday.

Japan's three-time Grand Slam winner Naomi Osaka has inspired a new manga character to appear in an issue of Nakayoshi magazine next month, the publishers announced on Sunday.

Novak Djokovic, Roger Federer and Rafael Nadal have been absent from the title match at the ATP Finals for the past two years, replaced by younger rivals seeking to smash their monopoly.

Russian Daniil Medvedev claims the biggest title of his career as he storms back to beat Dominic Thiem 4-6 7-6(2) 6-4 in an absorbing climax to the ATP Finals

Rafa Nadal's dream of a first ATP Finals title and Novak Djokovic's quest for a record-equalling sixth vanished in defeats by Daniil Medvedev and Dominic Thiem in two seismic semifinals on Saturday.

The start of the Australian Open is set to be pushed back from January to February or March next year due to COVID-19 protocols in the country, the Herald Sun newspaper reported on Saturday.

London’s farewell edition of the ATP Finals could still have its dream climax after world number one Novak Djokovic beat Alexander Zverev 6-3 7-6(4) to seal a last-four spot on Friday.

Rafael Nadal kept alive his hopes of a first ATP Finals title on Thursday, beating defending champion Stefanos Tsitsipas 6-4, 4-6, 6-2 in London to qualify for the last four.

Dominic Thiem held his nerve to claim an impressive 7-6 (9/7), 7-6 (7/4) win against Rafael Nadal at the ATP Finals as the Austrian moved to the brink of a place in the semi-finals on Tuesday.

Polarising Australian Nick Kyrgios Sunday admitted to be being in a "lonely, dark place" during recent years as he battled depression sparked by the relentless grind of the tennis tour.

Alexander Zverev overpowered Rafael Nadal in straight sets on Saturday to reach his first Paris Masters final, where he will face third seed Daniil Medvedev.

Novak Djokovic has sealed the year-end men’s world number one tennis ranking for the sixth time to go level with childhood hero Pete Sampras after closest rival Rafael Nadal opted against playing in the ATP Tour event in Sofia next week.

Rafael Nadal came from behind to beat Pablo Carreno Busta and reach the Paris Masters semi-finals on Friday, handing Argentinian Diego Schwartzman the last ATP Tour Finals place in the process.

Rafael Nadal battled into the Paris Masters quarter-finals on Thursday with a 6-1, 7-6 (7/3) win over Australian Jordan Thompson at Bercy Arena.

‘It’s a very special number ‘

Rafael Nadal said he was proud of a "great achievement" after securing the 1,000th Tour-level victory of his illustrious career on Wednesday, becoming the fourth man to reach that mark with a comeback win over Feliciano Lopez in the Paris Masters second round.

Novak Djokovic remains top of the world rankings despite his surprise defeat to lucky loser Lorenzo Sonego in Vienna last week, the ATP announced on Monday.