There have been calls for all tennis players to be vaccinated when the season eventually resumes, although the scientific community has warned a vaccine is at least one year away.
But such a plan would leave World No. 1 Djokovic facing a dilemma.
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“Personally I am opposed to vaccination and I wouldn’t want to be forced by someone to take a vaccine in order to be able to travel,” Djokovic said in a live Facebook chat with several fellow Serbian athletes on Sunday.
“But if it becomes compulsory, what will happen? I will have to make a decision.
“I have my own thoughts about the matter and whether those thoughts will change at some point, I don’t know.
“Hypothetically, if the season was to resume in July, August or September, though unlikely, I understand that a vaccine will become a requirement straight after we are out of strict quarantine and there is no vaccine yet.”
Former world No.1 Amelie Mauresmo last month said tennis should not resume unless players can be vaccinated. She tweeted: “International circuit players of all nationalities plus management, spectators and people from the four corners of the world who bring these events to life. No vaccine = no tennis.”
As with every other professional sport, the tennis world has been thrown into disarray due to the Covid-19 outbreak.
Governing bodies having suspended all tournaments until July 13, so far.
Wimbledon has been cancelled for the first time since World War II, and the French Open has been put back four months until late September.