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.

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

Obsession is a negative word, I do not think that obsession can bring positive things. Not only in tennis but, I mean in any situation of life.

I have been through two wars in my 24 years, and I know what it's like to be without anything, to see the bombs flying above your head.

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.

Tennis is a mental game. Everyone is fit, everyone hits great forehands and backhands.

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.