Tennis is a traditional game. A big sport like tennis does not need too many changes. The game has become too fast, there are hardly any long, interesting rallies these days. So maybe slowing down the courts could help. But you can't really stop a sport from evolving.

On Rafael Nadal: Every point he plays is like match point. That's why he's the champion right now.

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

I play tennis five hours a week, from Monday to Friday, for one hour every day. I like to be fit. If I can't exercise, I feel bad - I need to sweat and run to feel like I'm in good shape.

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.

If you're afraid of losing, then you daren't win.

I'm amazed that years after I stopped playing tennis, people still recognize me in restaurants and ask for my autograph.