The men’s world number one tennis player confirmed the diagnosis in a statement.
Sky’s Martha Kelner said: “Djokovic has become the fourth player to test positive for coronavirus after his Adria Tour which took place in the Balkans with zero social distancing.
“The world number one organised the tennis event which took place in Belgrade, Serbia and Zadar, Croatia. Fans were able to freely mingle with players who also played basketball and danced in nightclubs.
In a statement, the Serbian said that his wife, Jelena, also tested positive for COVID-19, but his children tested negative.