If you don't practice you don't deserve to win.

When you deal with somebody in the heat of battle, you see the best or the worst of them. So when you get through all that there is a great deal of respect.

It never seizes to amaze me how much I enjoy playing here and how much you fans have meant to me over the years.

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.

You know my dad pushed me to believe that I was going to be the best. I just never thought of life without tennis, even looking forward.

I feel old when I see mousse in my opponent's hair.

I've been motivated by overcoming challenge and overcoming the hurdles and obstacles that face me. There still is plenty out there to get motivated by.