Dimitrov, ranked number 19 and a three-time Grand Slam semi-finalist, is the current highest-profile player who says he has the virus, and his announcement on his Instagram page reaches the end of a week when the US Open said it would go ahead.
Professional tennis tours have been suspended since March and plan to resume in August.
Dimitrov said he made his condition public because he wanted "to ensure that any person who has been in contact with me for the last few days is examined. ".
" I am very sorry for any damage that may have been caused, "he wrote.
The player appeared last week in the Serbian leg of the event exhibition "Adria Tour" organized by Djokovic. There was criticism that there was no social distancing at the exhibition, which took place in front of crowded stands in Serbia, where the government lifted most of the virus restrictions last month.