"Upon arrival to Belgrade (from Zadar, Croatia, which takes place Saturday and Sunday, the second stage of the tournament), we went for tests. Mine and that of Jelena (his wife, ed) are positive. Those children are negative," said Djokovic in the press release.

"Everything we've done in the past month, we've done it with a pure heart and sincere intentions," explained the Serb, who has contracted the virus, as three other players present at the tournament : Grigor Dimitrov, Borna Coric and Viktor Troicki.