When you lose, you're more motivated. When you win, you fail to see your mistakes and probably no one can tell you anything.

Serena and I, we don't have anything to prove ... we still set a very high standard.

Sport teaches you so much, and you can translate that to other parts of life. But it's definitely a lot of dedication, not just for, you know, myself or the children, but the parents, the family finances, the money that you could be putting toward retirement you're using to buy tennis shoes and restring rackets and tennis lessons. So if you don't make it, then you may never retire. It's definitely a lot of risk.

Unfortunately the world is what it is now. People don't get along for whatever reason. As professional athletes, in a way we're almost ambassadors for peace, because sports brings everyone together.

The big push for me is the Olympics this year. If I'm healthy, I'm not worried about my ranking. I think I can hit the ball. It's just about my body cooperating. It's about being able to play matches in a row. Right now, I'm not sure how much I can do with that, but we'll see.

I wear a lot of tight dresses, so I'm like, 'I need to do my sit-ups!'

So what if you fail? At least you'll know what not to do when you try again.