You can't give up! If you give up, you're like everybody else.
If you're a champion, you have to have it in your heart.
Being famous before you've formed your personality, before you have that self-esteem, is dangerous.
You pay a price for everything in life.
In tennis, at the end of the day you're a winner or a loser. You know exactly where you stand... I don't need that anymore. I don't need my happiness, my well-being, to be based on winning and losing.
Every time, all the time, I'm a perfectionist. I feel I should never lose.