My strokes just weren't there.

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

My father had never watched tennis, never liked tennis too much. He said, 'OK, we buy a racket, we watch together,' because we didn't know anything. It was a process of learning together that made it more interesting.

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.

I'm trying not to pay too much attention to the rankings because calculations can distract you.

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.

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