I try to enjoy what I do, and every moment of the life that I have is a blessing. What else can you do but to be happy and try to bring that joy to the other people around - especially in the tournaments. Everybody has bad days. I'm not always funny or laughing.

I am the greatest tennis player. The other players are like coins in my pocket that I give to a homeless man.

I know that success does not come at once, it is not a thing achieved overnight. It is the result of many, many, many years of working and trying to achieve goals.

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.

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

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.

Not everybody can like what I do, and if you feel that somebody is coming up closer to you and starting the rivalry and everything, you maybe change your position to him.