French Open champion Rafael Nadal does not know when he will be fit to play tennis again, but insists he has "plenty of years ahead" in the sport.
The 11-time Grand Slam champion is recovering from a knee injury and has not played since Wimbledon in June.
"I will return to the court when I feel that the knee no longer gives me any pain, whether that is in two weeks or in three or four," said the Spaniard.
Nadal, 26, has slipped to fourth in the world rankings. http://www.bbc.co.uk/sport/0/tennis/19712224