Marriage isn't a 50-50 proposition very often. It's more like 100-0 one moment and 0-100 the next.

Don't be afraid to hit the ball.

I was always in the tennis business-from 1968. I was in tournaments and also on World Team Tennis teams as well.

I feel that tennis is an art form that is capable of moving the players and the audience - at least a knowledgeable audience-in almost sensual ways. When I'm performing at my absolute best, I think that some of the euphoria I feel must be transmitted to the audience.

Winning comes down to who can execute under pressure.

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.

No one changes the world who isn't obsessed.