Whatever your goal in life, be proud of every day that you are able to work in that direction.

Relationships are give-and-take, and when you're a tennis player, you're certainly not giving. You have to be self-absorbed. It has to be about you.

Training the body to obey the mind as I have done differs from the more conventional method of getting the mind to obey the body.

In tennis, at the end of the day you're a winner or a loser. You know exactly where you stand... I don't need that anymore. I don't need my happiness, my well-being, to be based on winning and losing.

If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.

I always looked ahead.

I realized that with hard work, the world was your oyster. You could do anything you wanted to do.