In tennis, you can make a couple of mistakes and still win. Not in golf.

If Davis Cup was a little bit less or once every two years, I would be more inclined to play. But the way it is now, it is too much tennis for me.

A couple hundred people around, and I'm shaking.

What I've done in the game is always going to stick, no matter what happens.

Choking is being in a position to win, and then experiencing some critical failure of nerve or spirit. That never happened to me. And I can't help but think it was because I was never afraid to lose.

Tennis is seen all around the world; if I am home or anywhere in the country, United States, people will stare.

I'm not going to give in to the critics. I'm going to stop on my own terms, not on when someone else thinks I should.