Coaches are very important to players. They're people that are mentors, people that are advising them, people that should be their friends and somebody you can rely on on the tour.

I had a nice childhood. War and all the experiences affected me as a person and helped me to grow, to change.

You have to consistently be successful to be one of the top players in the world, and everything is possible in life.

I understand that the results I've had in my career, or I'm having now, they are very good. And that gives me confidence, of course, but I do not feel invincible.

I am grateful to life. And also to the people who have brought me here. Without them, I could not be where I am now.

Nadal's the best player in history on [clay], and he is one of the best-ever players that played this game.

I always try to have something that keeps my mind relaxed, keeps my mind a little bit off tennis.