I didn't really care if I had a coach that much, me personally, because I was brought up to think for myself.

No matter how tough, no matter what kind of outside pressure, no matter how many bad breaks along the way, I must keep my sights on the final goal, to win, win, win-and with more love and passion than the world has ever witnessed in any performance.

It's really impossible for athletes to grow up. On the one hand, you're still a child, still playing a game. But on the other hand, you're a superhuman hero that everyone dreams of being. No wonder we have such a hard time understanding who we are.

I have a lot to say, and if I'm not No. 1, I can't say it.

Sports teaches you character, it teaches you to play by the rules, it teaches you to know what it feels like to win and lose-it teaches you about life.

The most important words that have helped me in life, when things have gone right or when things have gone wrong are 'accept responsibility.'

For me, losing a tennis match isn't failure, it's research.