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.

Well, I do feel that I carry the responsibility of representing my country wherever I am, and this responsibility came with the success that I had in last couple of years, not just myself but the whole group of tennis players that comes from Serbia. And athletes in general are, in this moment, the biggest ambassadors that our country has.

In my case, I can sincerely say that nothing is impossible... When I was saying I want to be No. 1 of the world, and I was seven or eight years old, most of the people were laughing at me because it seems like I have one percent of chances to do that, and I've done it.

Each year represents new challenges and obstacles. You have to adjust.

I've had my ups and downs in my private life.

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

People look up to me as somebody who is able to switch the image of our country from negative to positive.