You can't give up! If you give up, you're like everybody else.

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 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.

Now that I'm losing some, I can see how tough I was -- the killer instinct, the single-mindedness, playing like a machine. Boy, that's what made me a champion.

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

Whatever your goal in life, be proud of every day that you are able to work in that direction.

Cats are peaceful and tranquil - they bring calmness with their serene personalities.