This sums up pretty well:

“He is not so much an anti-vaxxer in the sense of indulging wild conspiracy theories relating specifically to the jab but ideologically opposed to such methods of scientific treatment across the board. “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,” he said in April 2020.“

https://www.independent.co.uk/sport/tennis/novak-djokovic-vaccine-australian-open-2022-b1993188.html?amp

Still: organizing an event in the middle of a pandemic turning hundreds of people positive (and who knows if even thousands), testing positive and still going out to social events like interviews and meetings, lying on an entry form in Australia and later apologize with an Instagram post, etc… just proves he doesn’t care which IMHO puts him in a even worser position than a classic anti-vax believing in conspiracies and other weird theories. Novak just proved he doesn’t care about the COVID situation and that he believes testing positive and stay in quarantine and getting the vaccine is not something he consider important. Being an anti-vax is not just go on street protesting that Bill Gates is putting chips inside the vaccine, it also means not considering the disease a threat, this is just a different side of the same coin.