My greatest point is my persistence. I never give up in a match. However down I am, I fight until the last ball. My list of matches shows that I have turned a great many so-called irretrievable defeats into victories.

Roger Federer is stylish.

You never know how long Federer is going to play, but in my opinion he has at least one or two more grand slams to win. It depends how long he stays motivated. For me, he is the greatest player to ever play the game.

It has changed, quite a lot. It is very different now, there are quicker men, they are taller, stronger, have great stamina. The balls have also become faster. Tennis has now become a power sport. There is more depth in the game, as well, there are many more players than there used to be. The entire character of the game has changed.

I'm amazed that years after I stopped playing tennis, people still recognize me in restaurants and ask for my autograph.

It's tough when you're No. 1. You don't have any private life, you can't even walk anywhere. I think that was one reason why I lost my motivation to play tennis.

On Rafael Nadal: Every point he plays is like match point. That's why he's the champion right now.