People wrote me off, but I believed in myself. I got the confidence back, and it grew and grew. I won my first major and my last at the place that changed my life.

Retirement is a work in progress. I try to figure out my day, and what I know about myself is that I need structure.

I don`t know why, but I love the dog eat dog nature of tennis. It`s real, it`s brutal and there`s no hiding place - it's like a one to one street fight. I love the intensity that comes with knowing you walk off court either a winner or a loser. It`s daunting but very exciting. There is no one to blame except yourself, no one cares who comes second.

In tennis, you can make a couple of mistakes and still win. Not in golf.

If Davis Cup was a little bit less or once every two years, I would be more inclined to play. But the way it is now, it is too much tennis for me.

Throughout my career, my mind rarely wandered, and I was never sidetracked by distractions, no matter what I was going through off the court.

After I went through two years of not winning an event, what kept me going was winning one more major. Once I won that last U.S. Open, I spent the next six months trying to figure out what was next. Slowly my passion for the sport just vanished. I had nothing left to prove.