I'm an athlete and I'm black, and a lot of black athletes go broke. I do not want to become a statistic, so maybe I overcompensate. But I'm paranoid. Oprah told me a long time ago, 'You sign every check. Never let anyone sign any checks.'

I can't become satisfied, because if I get satisfied, I'll be like, "Oh, I've won Wimbledon, I've won the U.S. Open. Now can I relax." But now people are really going to be fighting to beat me.

For the younger sisters, we always look up to the older sisters because they're always ahead of us and they always win.

My dad is a marketing mastermind.

I'm really exciting. I smile a lot, I win a lot, and I'm really sexy.

I never close my mind to anything and eventually want to branch out. But for now, tennis is still number one for me.

With a defeat, when you lose, you get up, you make it better, you try again. That's what I do in life, when I get down, when I get sick, I don't want to just stop. I keep going and I try to do more. Everyone always says never give up but you really have to take that to heart and really do never definitely give up. Keep trying.