I am hoping for a great match, but obviously I want Federer to win. Murray hasn't lost a set, but he hasn't faced tough opponents yet. I think Murray will be fresher than Federer (younger, and less time on court), but Federer shouldn' be really tired. Tonight's match took 3 and a half hours, and the last 2 sets were the most physical.
My only concern, which might explain Federer's so-so serving tonight, is that he was wearing that black under shirt. I know that he was wearing a white one before, but this one reminded me of the one he wore at Wimbledon when he had back pain. I hope that he isn't having any problems.
Let's go Federer!!
edit: I forgot to mention that this is their first GS meeting outside of a final, so I think there will be less pressure on Murray.