Serena gets more USO crowd support than Venus
I think that unlike in Venus-Clisters match, this time the crowd will be more behind Serena. Although on this board, more people seem to like Venus than Serena, the larger US audience seems to prefer Serena. Lets forget about the actual Venus-Serena H2Hs that have occured at the USO because those matches are really anomalies. But twice now ('05 and '09), the USO crowd has really been a factor against Venus in big matches.
My theory for this is that Venus not only shows too little emotion during her matches, she also shows too much emotion after her victories, giving the impression of a showboater. Serena on the other hand is emotional all the way through, and I think the audience just finds her more authentic.