One thing that has been overlooked regarding the match up between Murray vs Ferrer and that is they often hit together in practice sessions, or have done in the past, i'm pretty sure i read that they still do occasionally especially on clay so surely over the years Ferrer is more in tune with Andy's game than he is with the other members of the big four which gives him somewhat more confidence in playing him.
I think that's a very good point. I've seen it mentioned in just one or two articles, and it is probably most relevant when comparing David's attitude when playing Andy rather than the other three. Obviously, knowing Andy's game is going to help, but I think he's overly respectful of them, rather than it being an issue with how Andy is or plays, so outwith Andy's control.
That said, if Andy's serve had been working even vaguely well on Sunday, it would have been a much more one-sided affair.