What matters isn't how well you play when you're playing well. What matters is how well you play when you're playing badly.

Whoever said, 'It's not whether you win or lose that counts,' probably lost.

I know some of my self-worth comes from tennis, and it's hard to think of doing something else where you know you'll never be thebest. Tennis players are rare creatures: where else in the world can you know that you're the best? The definitiveness of it is the beauty of it, but it's not all there is to life and I'm ready to explore the alternatives.

Concentration is born on the practice court... you must mentally treat your practice sessions as matches, concentrating on every ball you hit.

What I would tell girls coming up is just be yourself and don't let people get in the way.

The only people that really have a chance against Serena [Williams] are people that are strong, that can handle her power that move well, and that's a difficult combination.

I have always had this outrage at being told what to, how to act, whom to love.