Natural talent only determines the limits of your athletic potential. It's dedication and a willingness to discipline your life that makes you great.

I like putting money back into what made my life, and tennis has been great to me.

I didn't really care if I had a coach that much, me personally, because I was brought up to think for myself.

When I was playing, we didn't have to compete against everybody in the world. Now it's a truly global sport, so the competition's much greater, just like it is for our children in every other area, whether it be in science or technology or whatever you talk about.

Tennis taught me so many lessons in life. One of the things it taught me is that every ball that comes to me, I have to make a decision. I have to accept responsibility for the consequences every time I hit a ball.

The main thing is not a matter of wanting to win; the main thing is being scared to lose.

I knew after my first lesson what I wanted to do with my life.