There are many moments during a match when you are tense, wrestling with yourself. Tennis is a lesson in self-control.

Some people may learn something from the way I play tennis. But there are also players who are better than me in certain techniques.

All sports are continuously developing, but what they all have in common is that the speed is increasing. That's also true of tennis; the ball is getting faster and faster.

I doubt about myself. I think doubts are good in life. The people who don't have doubts I think only two things-arrogance or not intelligence.

It is no longer enough to play very well. You need to be able to give an answer at all times and everywhere. You cannot hide. This has something to do with maturity, and that is something you only acquire over the years.

I have lived my whole life with high intensity.

I'd rather lose an argument than get into a long discussion in order to win it.