Juan Martin del Potro not thinking about injury

Juan Martin del Potro has insisted that he is not thinking about his injured knee after progressing at the French Open.

The Argentine, who had some bandaging on his left leg, defeated Edouard Roger-Vasselin in four sets on Wednesday to reach the third round.

"What I try and do is not to think about it," the world number nine told reporters. "I try and do my best with my tennis. And when I'm out there on the court I try not to think too much about the fact that it really bothers me."

Del Potro will take on Croatia's Marin Cilic in the next round.