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

The confidence is there, the game is there, but physically you can't fight nature sometimes. You can't do much about it.

Mostly the problems when I was down were caused by myself. There were times when I was not responsible enough or decisive enough.

We spent all day travelling, living away from the people you love, not sleep in our own bed ... We are far from our own houses. We live in hotels, clubs. And now that I am a father it is much more difficult.

Tennis is my life, obviously; I need to focus, I need to win. But it's not the only thing. I'm not going to play forever.

Imagine a part of the U.S.A., from which the U.S.A. started - where is the cradle of your history? This is Kosovo for Serbia.

My strokes just weren't there.