If you get operated, something can go wrong and you can just say bye-bye to tennis. That's what happened to a lot of soccer players in Europe. They get operated, some things, it's not the mistake of the doctor. It's just some surgeries, they just don't go the right way...My injury will never go away. It's already become so chronic there's no chance to fix it so I can play without pain.

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.

I didn't change the world.

If you're losing, just be a man; be a man and lose as a man.

You cannot change me; this is the way I am.

You're playing or you're not playing. If you're playing, so just shut up and play.

I just want to make everyone happy.