It's kind of a lot of everyone 'who's going to show up.' Of the matches to finish, Verdasco should be in control over Gasquet. Murray/Kohly is all about who starts at high-speed. Gulbis is always anyone's guess, though I think Roger takes it. (Berdych/Isner and Raonic/Granollers might be a bit "who cares?")
I saw Tsonga interviewed after his win yesterday, and he's rather gunning for Djokovic. Still resents losing the AO to him, and probably the RG match in 2012. And he's playing well. I'd be surprised if it's straights. Might be that Djokovic wins in 4, but with the crowd, and Tsonga in a mood, I'd look for a possible 5-setter.