Contrasting styles is always the most fun to watch

Federer can be the best ever; he has the potential. The only question is whether he has the desire

But in 2000, the injuries really started to kick in and my elbow gave a lot of problems. At the end of the year I had to take 20 months off before I could come back into the game

I was serving good but was returning especially well, which was a weakness in my game. So not only was I serving well, but I was also breaking these other guys, and they felt the pressure

Guys like John McEnroe, Bjorn Borg and Stefan Edberg were also very good grass court players.

Roddick has good presence on the court and has so much adrenalin

For the first couple of years I played really bad tennis. It was so bad that they booed me off the court