Top-ranked Novak Djokovic is unsure whether he'll play at the Monte Carlo Masters this week, even though he is optimistic his right ankle injury is healing.
The Serb twisted his ankle on April 7 during quarterfinal Davis Cup play against the United States. Tests showed the damage was not as serious as Djokovic feared, and he has been training with his coach for the past three days before his scheduled second-round match on Wednesday.
But Djokovic, who lost to eight-time champion Rafael Nadal in straight sets in last year's Monte Carlo final, says he won't take any risks.
''I can't 100 percent guarantee that I'll be on the court on Wednesday,'' Djokovic said Sunday. ''I still have to be realistic and see if on some practices in the next few days I push myself to the limit, if I'm going to have any discomfort.''
Djokovic, who has a home in Monte Carlo, will only play if he thinks he's full strength.
''It's a ...