If they had rankings in baseball, maybe I would have been able to do the math and figure out my chances of being a professional baseball player versus a tennis player. But that was the decision-maker for me, I just thought I was better in tennis.

I will do everything in my power to make sure people are aware that our team is out there fighting the good fight for the tennis fans of the United States.

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

There are things we can't control - like the wins and the losses.

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.

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

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.