Murray vs. Federer will probably be the last chance either of them get to win Wimbledon, so that match would be absolutely fascinating.
Anyone vs. Djokovic will as the above poster said, be an absolute nightmare, even though he had an early scare today against Mayer and dropped a set against Ferrero, he was imperious against Troicki and it's so hard to look past Novak to win his second Wimbledon and second grand slam this year.
Let's not forget about JWT, he really has had the bit between his teeth since dispatching Fish and I'm sure he's going to be pumped to end his losing streak against Murray, I don't think Murray is quite in the final yet and this could prove to be a tougher test than the last couple of sets against Ferrer today.
Quick kudos to Ferrer, I thought he was excellent today and deserved so much more than a solitary set, I imagine it's so tough for players having to tackle the player over the other side + 15,000 spectators.