I wanted to win, even in practice.

The ball is round, the game is long.

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.

I just hated to lose.

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

I had a great tennis career. I have no regrets. But to find peace with yourself, and to finally be with your family - I'm probably the happiest guy in the world.

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