People say, "Do you know how much a million dollars is?" I don't have a clue. How many Big Macs will it buy me?

Men can have a huge turnover of sponsorship and still survive a lot better than the women. But the women's ratings are better, at least at home in the United States than in the men's tennis.

Tennis is a game of angles. You never have time to figure the angles. It's practiced. It's so practiced that it becomes an instinct. You just know where to put the ball. You just feel it. It has been computed into your brain so many times ­ it is there.

Don't let anyone define you. You define yourself.

A champion is afraid of losing. Everyone else is afraid of winning.

Be bold. If you're going to make an error, make a doozy, and don't be afraid to hit the ball.

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.