Djokovic positive for coronavirus, questions over return of tennis

Djokovic, who was not showing any symptoms, joined fellow players Grigor Dimitrov, Borna Coric and Viktor Troicki in testing positive for Covid-19 during the second leg of his Adria Tour where social distancing was minimal, players were filmed dancing bare-top in a nightclub and embracing each other over the net.

Djokovic said his wife Jelena also tested positive while the results of their children were negative.

"I am extremely sorry for each individual case of infection," said the 33-year-old Serb, who has said he would be against a compulsory coronavirus vaccination if it became a requirement for tennis players to travel to tournaments.

"I hope that it will not complicate anyone's health situation and that everyone will be fine," the 17-time Grand Slam winner said, adding that he would now go into self-isolation for the next 14 days.

Djokovic and other players including Belgrade winner Dominic Thiem were seen partying at a packed night spot in the Serbian capital.

Thiem has since travelled to the south of France to play in another exhibition tournament in Nice, where his test came back negative.

Commenting on social distancing measures during the Belgrade leg, Djokovic argued that both Serbia and the region had been relatively successful in containing the virus.

But the Adria Tour had already suffered an embarrassing setback when the planned Montenegro leg of the four-nation tournament was cancelled when it became apparent Serbia's health requirements did not match up to those of Montenegro.

Australian tennis star Nick Kyrgios called it a "boneheaded decision to go ahead with the 'exhibition'", while Britain's Andy Murray called it "a lesson for all of us".