Fed is obviously the favorite, he was before Nadal got hurt. But he can't relax at all, he needs to bring his A game...
because Cilic can beat him and even though some of those other guys are not big names(Chung will be soon) they are playing the best Tennis of their careers and can beat him.
Federer has owned Berdych recently, but Berdych is talented and all it would take is for Fed to be a little off to lose that match.
But with that said, I do think he will win the whole thing.