Grigor Dimitrov was one of the first prominent names on the ATP Tour to contract Coronavirus and he has spoke about suffering from long-term symptoms also known as 'long COVID'.
Dimitrov contracted the virus after playing in the Adria Tour in Serbia and Croatia and while he admits he feels a bit better, he went onto say that he still feels long-term effects.
"I almost feel I shouldn't have gone to the States but I had to test myself, I had to know where my body was at.
"Every time I wanted to see it was maybe a couple of steps forward but maybe one step backwards."
Speaking from the European Open in Antwerp at the end of October, he said: "I feel way, way better - I don't even take naps any more or anything like that.
"But there are some things here and there that you're like 'Oh man, that's not the same'. It's fine, I get it but who knows how this thing is going to go. All I hope is that I don't get it again."
"As a player I could have easily stayed home and just not said a word, right? But I said to myself 'no, that's not right'. There were so many kids around me and god forbid they had some other health issues, then what would I do? Can I live with myself? No I cannot."