Once you start believing in yourself, anything is possible. Once you start believing in yourself, your dreams take shape. The more you believe, the more you achieve.

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.

The tennis ball doesn't know how old I am. The ball doesn't know if I'm a man or a woman or if I come from a communist country or not. Sport has always broken down these barriers.

Losing still hurts, but that's good. When it stops hurting, that's when I stop playing.

I haven't bought any leather articles for a very long time. My ideal is to be able to avoid all animal products, in food as well as clothing.

I hit some great shots in my lifetime; now I hit a decent shot and I get a standing ovation.

Keeping a journal of what's going on in your life is a good way to help you distill what's important and what's not.