Tennis is interesting because the women are almost more popular than the men. In the U.S. Open, women even get exactly the same money as the men.

To be a champion, I think you have to see the big picture. It's not about winning and losing; it's about every day hard work and about thriving on a challenge. It's about embracing the pain that you'll experience at the end of a race and not being afraid. I think people think too hard and get afraid of a certain challenge.

Here's what I've learned about eating healthy when you're busy: It's all about preparation. Make your snacks on Sunday, and you will be good to go until Thursday or so.

Thinking about your training should put a smile on your face. As cliche as it sounds, you are worth all the time and energy you've put in. Unleash your emotions with a cheer, or even a signature roar, after a tough workout.

The first mile is mental. The rest are all heart.

When I was younger, I would eat everything.

I don't care how much you're working out; when you go to put on that bikini, you're like, 'Oh no!'