Unbelievable, yet, what else could it be?

America has an interesting global role, don't we? It certainly seems to be changing. Our government right now has a softer hand than we've had in the past, but I still think that we're the global behemoth.

You need to look to make a cohesive calendar that makes sense and helps elongate the careers of your players as opposed to shorten them inadvertently.

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

You have to be extreme to be exceptional. I couldn't revel in being number one. I had to get to zero. When my fitness was at its peak, I was intimidating. I made guys cave in. They'd be dejected in the locker room after matches, and I'd go out for a run, as if it wasn't enough. I'd rub it in their faces. I meant to do that.

There's a reason why Federer and Nadal are so gracious when they lose. They sleep well at night knowing that they've given their best.

I think all of us are shaped by the choices we make.