It's not easy to part with the trophies. However, I do need to have some long-term financial security for those close to me.

Basically I started playing double handed on both my forehand and backhand side because my first racket was very heavy.

You never know how long Federer is going to play, but in my opinion he has at least one or two more grand slams to win. It depends how long he stays motivated. For me, he is the greatest player to ever play the game.

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 just hated to lose.

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.