Sometimes it's just harder to remind yourself about what you're doing and why you're doing it... Other times, you have a great desire for it, but physically you're not responding the way you want. That presents other challenges. Then sometimes it all comes together.

My only good result in 1997 was marrying Brooke Shields.

There's a lot of good waiting for you on the other side of tired. Get yourself tired.

Freed from the thoughts of winning, I instantly play better. I stop thinking, start feeling. My shots become a half-second quicker, my decisions become the product of instinct rather than logic.

First of all, in any sport where you can measure distance, height speed and all of that, you see how athletes have changed their sport and made it better. I believe, with every generation, the sport has improved. Certainly, in the men's game, that has been the case. I think that I played Pete [Sampras] at his best, I played Roger [Federer] at his best.. I believe wholeheartedly that Roger and [Rafael] Nadal have pushed the game much further than myself or Pete ever did. Their options on the tennis court are considerably more than ours.

Tennis was always sort of a - a learning. It was a vehicle for me to discover a lot about myself.

I question myself every day. That's what I still find motivating about this. I don't have the answers, I don't pretend that I do just because I won the match. Just keep fighting and maybe something good happens.