Tennis is more than just shots. It's about being clutch and beating the people on the other side of the net.

You can look directly at the NFL and see how successful they've become because they have central control, central voice, and it doesn't mean that the owners don't have a say, but the commissioner runs it, and he's the one who speaks for them when they go out and do commercial deals.

America is the world's policemen, whether you and I like that or not. That's a fact. People globally feel that.

It is very dangerous to have your self-worth riding on your results as an athlete.

It's hard for anyone in the 24-hour news cycles that we all live in now to follow something that the first round is played in March and the final finishes in December. I understand the challenges there.

Focusing on one thing can be tough, and people with fewer options are more apt to concentrate on what they're doing. There's probably something to hunger.

What separates the winners from the losers is that they can deal with doing their best while still coming up short.