Several tennis players, including world number one Novak Djokovic, have contracted the coronavirus.
Novak Djokovic, from Serbia, told local media that he and his wife tested positive, while their children were protected from the virus.
Djokovic has been criticized for holding exhibition events and inviting athletes from other countries during the Coronavirus pandemic.
During the opening round of the tournament in Belgrade, the stands were full and the players hugged each other in the net, played basketball, posed for pictures and held press conferences.
During the tournament, the players’ entertainment activities and dance videos also went viral.
A few weeks before the event, both Serbia and Croatia eased the lockdown, and people at the event did not follow the social distance principle.
Serbia’s Viktor Troicki said both he and his wife tested positive for the coronavirus.