World tennis No. 1 Novak Djokovic said he's concerned with the possibility of players being mandated to receive coronavirus vaccinations before returning to competition.
"Personally, I am opposed to vaccination," Djokovic said on a Facebook Live chat Sunday alongside fellow Serbian athletes. The 17-time Grand Slam winner said he's been against vaccinations long before COVID-19.
"I wouldn't want to be forced by someone to take a vaccine in order to be able to travel," Djokovic said. "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."
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Djokovic won the last Grand Slam played in 2020, the Australian Open. Wimbledon was canceled for the first time since World War II, the French Open was rescheduled to the end of September and the U.S. Open still is set for August.
Djokovic said he understood why a vaccine would be necessary, although he didn't make it clear which direction he'd go if it came down to it.
"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," the 32-year-old said"
Last month, former world No. 1 Amelie Mauresmo wrote on Twitter: "No vaccine = no tennis."
Medical experts, including Dr. Anthony Fauci, the United States' top infectious disease doctor who is part of the coronavirus task force, have said that vaccines against the coronavirus might not be ready until at least 2021.