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.
You always have to continue working, because everybody is. Once you stop, the others will overtake you.
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.
I prefer playing ATP tournaments and Davis Cup competition rather than Olympic Games.