Very true. Murray played very well, and Fed did not play well tactically. I don't know why he didn't try to be more aggressive instead of rallying from the back over and over again. Easier said than done of course. I guess the fact that his 1st serve % was very poor didn't help him to attack as much as he would have liked. Maybe also his long 5 set match against Tsonga tired him more than expected. After all Fed is amazing but he's not a machine, right?
Absolutely agree!
I think Roger's become very wary of the running forehand that Murray, Djokovic, and Nadal all possess. That's why he seldom uses the down-the-line forehand against them because he knows that no matter how well he plays the point, there's always the possibility of that shot being hit back as a crosscourt winner. Also, Murray was playing very aggressively and everything he hit was going over or landing in. Roger is very aware that he cannot sustain a high level of aggressive play without giving anything up, and against Murray, that cannot be afforded. And, as you said, he was getting close to nothing from his serve.
I honestly don't think his match against Tsonga had much to do with this loss. The QF match really wasn't a very physical one and Roger has recovered from tougher five-set matches before. I do think that the sheer amount of energy (both physical and emotional) he put into winning the fourth set left him drained for the fifth, and that's why he dropped his serve so early in that set. Full credit to Andy for not allowing his concentration to drop after being broken when serving for the match in the fourth set. He recovered very well in the fifth.
To me, though, what's really amazing is that despite his serve being almost completely absent during that match he managed to win both of the sets that went into tiebreaks. That speaks volumes about how well Roger fought in this match. I said it many times before but I never saw Roger fight harder in any match than I did in this one. And he made me extremely proud to be his fan after that match because of it!