Forget the choking parts, he was just poor today.
He won't even be in position to choke against Murray(if he manages to go that far) if he plays like that.
You can't possibly compare the games of Giraldo and Murray. Giraldo was just standing on the baseline hitting hard and flat every single shot. Murray is a lot more defensive and will allow anyone play their game more.
Richard after 7-5, 5-0 started to fool around and played way too loose, but it was never really in doubt and when he needed he could raise his level. It was ok for first round.