Novak Djokovic says he will only play at this year's Wimbledon if he can "fight for the title", but his recovery from knee surgery is going "in the right direction".
The seven-time champion tore the medial meniscus in his right knee at the French Open and had surgery less than three weeks ago.
He intends to make a decision on whether he will play at this year's Championships, which start on 1 July, before the draw is made on Friday.
He trained for nearly two hours at Wimbledon on Monday, with a support bandage on his knee, and said afterwards that it was "great" to be back at the All England Club.