Re: How far can Djokovic go??
I don't think how well a young player does against Federer is a good barometre of their future level. Federer has struggled in his first match with every decent youngster he has played in recent years ie Minar, Gasquet, Berdych, Monfilis, Murray, Nadal and Baghdatis.
His match against Ljubicic does show he has a lot of potential, but I don't think he is in the league of Gasquet and Berdych, who I think are future slam winners.