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.

The knee just isn't 100 percent. It's hard to be out there when you know that you can't play at your best and could potentially make it worse.

I think a smile can make your whole body. Models, they look fabulous, but they don't smile, and they look so mad.

Am I the greatest? I don't know. I'm the greatest that I can be.

Having a pulmonary embolism is definitely easier than heart break.

Yeah, um, I do twitter because I want people to, you know, get to know me, my fans, or my fans to get to know me, you know, just see what type of person I am. You know, hopefully be more on an intimate level with me as opposed to a distant level.

Luck has nothing to do with it, because I have spent many, many hours, countless hours, on the court working for my one moment in time, not knowing when it would come.