I'm not a guy who needs to read motivation books.

I've probably put up with more criticism than a lot of people out there. At the end of the day, you block out everything, especially with your personal life.

My video game character is a bit better looking than me, actually. I don't think he has to worry about his hair getting messed up.

I'm one injury away from hanging up the racket at any time.

He's up there. But (Marat) Safin, on his game, is as hard to beat.

Why'd you leave the match, huh?

I was lucky enough to win the Davis Cup in my first year in 1999. I won my first slam at the U.S. Open in 2001 and became world No. 1 later that year. By the age of 20, I'd done it all.