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'm not an overly ambitious person; I don't feel like I have to excel.

To be a tennis champion, you have to be inflexible. You have to be stubborn. You have to be arrogant. You have to be selfish and self-absorbed. Kind of tunnel vision almost.

If I win several tournaments in a row, I get so confident I'm in a cloud. A loss gets me eager again.

You pay a price for everything in life.

Single-mindedness. I hate to say it because I don't think it's the best thing for developing a person, but the single-mindedness - just concentrating in the one area - that's what it takes to be a champion.

Being famous before you've formed your personality, before you have that self-esteem, is dangerous.