The mark of great sportsmen is not how good they are at their best, but how good they are their worst.

Security used to be an inconvenience sometimes, but now it's a necessity all the time.

I have always had this outrage at being told what to, how to act, whom to love.

I've been talking to Martina [Hingis] about playing for a couple of years. Maybe I can convince her to play some doubles.

If it feels right in your gut, this is who you are, this is what you do, this is what you feel, then don't hide that. You just stick to it and the world will catch up.

The longer I stay in the States, the more I understand how important it is to smile and seem like a nice guy. Like Ronald Reagan. Your image seems to count more than what you do.

All top players are the same strokewise, but mentally I can improve and that's where it's at for top players.