The world’s top-ranked tennis player, Novak Djokovic, has tested positive for coronavirus. The news comes days after he hosted a pair of charity tournaments where three of his peers tested positive. He was also filmed partying with those same players at a nightclub in Belgrade, Serbia. Djokovic has said he’s against taking a vaccine even if it becomes mandatory to compete on the tour. He apologized to anyone who was infected at his tournaments, but defended organizing them due to their “philanthropic” nature.