Well done, Rogelio!
First set was a very tight one, but Roger did well in the deciding TB. Second set, Roger steamrolling Acasuso.
I wish I could tell more about the way Roger was actually playing, but I watched the match on a very crappy livestream which kept on freezing all the time. So it's hard for me to say whether he was actually playing good. I'd say he did enough to secure the win, but he's still not back to his old form - whatever some idiotic Fedfanboys/commentators might say.
Like Rogiman said, if Roger (hence: IF) manages to reach the final and meets Rafa there, it will be a victory for Rafa, unless Roger indeed finds his old form back, which I do not expect to happen within a few days.