If you're a champion, you have to have it in your heart.

When I play, I'm boiling inside. I just try not to show it because it's a lack of composure, and if you give in to your emotions after one loss, you're liable to have three or four in a row.

I think team sports probably teach you more about giving - about being unselfish and being flexible.

If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.

Training the body to obey the mind as I have done differs from the more conventional method of getting the mind to obey the body.

I can definitely say the same thing [discussing Steffi Graf's claim that she had played against at least one top player who used steroids]. Steroids can really make a difference, physically and mentally. I'd be really disappointed if I had been ranked No. 2 behind someone who took steroids.

Every time, all the time, I'm a perfectionist. I feel I should never lose.