I always listen, I ask children, I even ask adults in tennis, "What are your children playing?" And most of the time it's not tennis. It's pathetic.

Winning comes down to who can execute under pressure.

The main thing is to care. Care very hard, even if it is only a game you are playing.

I always think it's best to pretend you're in a tenuous position. Just as a player, you always want to stay in the now and work hard but also have goals for the future. There's no promises in any entrepreneurial business. You have to really work hard every year and also try to envision where you want to go in the future at the same time.

Being Number One isn't everything to me, but for those few hours on the court it's way ahead of whatever's in second place.

At 62 you want to keep moving; that's important.

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.