I guess some kids around me had to grow up quickly, had all those problems. But I wasn't one of those kids, or around those kids, not at all.

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

I believe I live in a black and white. I think things are like either black or white. I don't really believe that much in the gray. I think that there's gray for a lot of people, but I don't live in the gray. I realize whatever action I have or take, it's going to have a consequence -- either good or bad. So I live my life in a way where I don't have bad consequences. I just notice there's a lot people around me just live in the gray. I don't know, for me, I'm just really straightforward.

When you get into that habit of winning, it gets - I don't know if you call it contagious - but it gets to be a habit. She's developed an unbelievable habit.

Serena and I have done some great career planning, and we're playing really at the peak of our tennis right now. I think tennis has been a sport where people play this insane schedule from 14 years old, so of course at 26, it's over. We've really paced ourselves.

Just believe in yourself. Even if you don't, pretend that you do and, at some point, you will.

Well, when I walk behind short people I feel like I'm going to fall over because I start taking these little steps, and I can't take little steps.