Former Wimbledon Champion Rafael Nadal is still not sure about playing in the Wimbledon due to chronic knee problems.

The World no. 1, Nadal said that he is trying his 200 % to be fit for the Wimbledon but he will play in the Wimbledon only if he is 100% fit.

He further added that he has been playing with the pain in the knees from last few months and this pain was hurting him mentally as well as physically as his certain movements were limited by this knee pain.

Nadal had defeated Roger Federer in the final of Wimbledon last year but this time Nadal is doubtful to play in the Wimbledon due to "insertion tendonitis" in both kneecaps.

Spanish tennis federation (RFET) doctor Angel Ruiz Cotorro said that Nadal will undergo through physiotherapy and anti-inflammatory drugs and intensive muscle work will also be part of his treatment.