To stay interested in tennis, I have to mix it up with other things.

A win's a win, unless it is not a win, and then it's not a win.

Whatever it is, people have issues and that affects you deeply. So you have to get to the bottom of it and not let that affect your life decisions and really understand why you're making the decisions you make so that way you can understand how to not do that, so I always encourage people to ask why and then to really understand you, because that's the only way to be your most successful and your most happy.

My style is kind of eclectic and I don't like to do the same thing over and over again. I like to have fun and explore myself so you won't see the same design.

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.

Some people say I have attitude - maybe I do... but I think you have to. You have to believe in yourself when no one else does - that makes you a winner right there.

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