My mother said I would have more chances to become a tennis player than a football player.

I was very competitive. I hated losing. No matter what, I had to win.

I pass through the difficult moments in life, really difficult times on grass, during my seven years of my career. All of a sudden I felt comfortable.

I could go and make commercials left and right and pretend like I am a celebrity, but that is not me.

I think it's difficult to be No. 1. 'There's too much attention, too much expectation from other people.

Right now my main aim is not to get injured any more. I am a little bit afraid of running and sliding because the ankle was so painful. But I am not a person who runs a lot, who spends a lot of energy on the court. If I am mentally OK, if nothing is bothering me and I want to play, then it is fine.

Roger [Federer], he brought tennis... one level higher. Normally he toys with everybody. With all respect to other players, he does whatever he wants on the court against them. It's incredible what kind of game he can play.