It's tough when you're No. 1. You don't have any private life, you can't even walk anywhere. I think that was one reason why I lost my motivation to play tennis.

When I retired from tennis I wanted to do other things with my life.

I don't think you have the right to shout about other people's private life.

Life can be tough, but it's tougher if you're stupid. You think you got problems? Get in my private jet and we'll go to Somalia or Rwanda. I'll drop you off in the middle of Baghdad.

About my books, that's all that I think the public has, in its normal way, to know. My private life is, by definition, private.

I don't feel any need to play the role of the clown. In my private life I take a break from humor.