Even the poor can be fat in the U.S. That says something about a country. That's how incredible what we have is. But it can also take away incentive.

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

I think the Davis Cup has some untapped potential. It should be as prominent as the Grand Slams when it takes place. If you put it together with Fed Cup for an organized, nationalistic team competition taking place in a central location for two weeks, I think that would be beneficial from a fan interest stand point, from a media stand point and from a television stand point.

You need to make sure everyone is healthy first and foremost.

I think there's no reason the Davis Cup couldn't be as powerful and popular and profitable as any of the four majors are today, given some changes.

You'd have to think that if he'd been around today, Rod Laver would have been Rod Laver.

Many books have been written about what the X-factor is, what separates people who win big matches versus those who struggle. Some of it's innate, but there's a piece of it that's learned, embracing those moments.