I always try to show my human side to my colleagues and to the whole circuit. More than anything because we are all on the same train, it is part of our work.

I'm a happy man, because I am successful in what I do, of course; but what makes me most happy is I have people around me that I love and who love me back. This, for me, is the most important thing. Nobody likes to be alone.

I don't think, that you can always - you can ever - get your game to perfection, you know. Only if you're Federer.

In terms of playing ability there is nothing to choose between number one and 100. Instead, it's a question of who believes and who wants it more? Which player is mentally stronger? Which player is going to fight the hardest in the big points? These are the things that determine who is the champion.

... the winner is the one who believes in victory more.

In order to stay where I am - and I want to do that - I have to stay dedicated as well as I have been before I became No. 1.

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