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

I physically feel very fit. I’m very motivated to keep on playing on a very high level. I’m going to try to use these years in front of me to fight for the number one of the world and fight for the biggest titles.

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

My mother is a special story. She went through so much to bring us up, four men at home, especially when our country was going through really difficult times.

We have a harder way to succeed in life as Serbs because of the past that we had and because of the history we had.

I don't think there has been enough communication between the players and the tournaments. In one sense it's just as much the players' fault. Players talk between each other and in the locker room about things that can be improved and then when the time comes to talk and really do something about it they stop.

When my boy arrived in this life, on this planet, it was completely a new dimension of experience for me and my wife. I'm still riding on the wave of that experience.