Everything is tennis for me, it's my career and it's entertainment, but it's also a business.

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.

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.

I know I'm good at tennis. Other than that, everything else is a wild card. I'm a wild card.

Every Olympics is something special. If you're fortunate enough to play for your country - there's just so much energy. It's truly amazing.

I think that Billie (Jean King) and Zina (Garrison), they have a whole lot of experience. Even if I don't quite agree with something or have a different way of doing it this week, whatever they said, I did it right away and I found out that it was correct. I think that's helped a lot...I'm having fun. I had a lot of fun out there. Sometimes I was ready to smile -- but I knew I'd lose focus -- because I was doing things that I'd done in practice and we talked about. I was ready to laugh and give someone a high-five, but it wasn't time for that.

Sometimes, when there's a video montage. I'm thinking, 'That's my life. Oh, my God, I did that.' Yeah, it's amazing.