I am quite sure that Federer will hit a lot more than 6 unforced errors in a final against Nadal, because he will have to if he wants to hit any winners (besides service winners).. Against Ancic it is easy, because he is always at the net and moves quite slowly when he is at the baseline. So Federer can hit his shots with a lot of margin and still win quite easily.. Not so against Nadal. I also think that Nadal has the best chances to win, and it will surprise me if the match goes over 5 sets.