The guy is the greatest male athletes of all time.

When I first started really playing, in '98, I was super excited to see all the people I grew up watching. ... I loved Monica Seles, Steffi Graf, and Pete Sampras.

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

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.

I think my father is probably the best coach ever because, if we talk about numbers, he's got a lot and he's only had two players.

I feel as a brand I'm here to be around for a long time.

Honestly, I could get in a car accident today and never play tennis again, and then I wouldn't have anything to fall back on. But fortunately enough, I do.