I prefer playing ATP tournaments and Davis Cup competition rather than Olympic Games.
You always have to continue working, because everybody is. Once you stop, the others will overtake you.
Against Novak, it's really tough for me to play, I mean, because he doesn't give me any time. I don't really like to play against him because he has a game style which doesn't fit me at all.
In the juniors, you are kind of a star, but just because you are a good junior doesn't mean you will be a good pro.