I'm gonna stop under estimating Roger
(at least for just the SF match)
Not only does Roger have the mental advantage (4-0 H2H with a couple of bagels along the way) he also simply plays the better all court tennis
Roger will just keep slicing that ball nice and low and JMDP will be in trouble. Also, Fed is way more aggressive in his tennis than Murray, and actually knows how to play on the surface. He will try to dictate most of the play and go from there. Another thing to bear in mind is the fact that Roger has had way more rest than him, and to be frank I can't see Del Pony beating two top4 players in a row. It's not really the norm, and Roger is hungry for that final.
There. I've made up my mind.