I think that Nalbandian is quite underrated on grass. Today's match showed that his flat forhend and backhand and ability to create angles out of no pace balls , could be very , very effective weapon.
Of course, he will be more dangerous on a slower grass (like Wimbledon is) and only if he starts to serve as he had served last autumn in Madrid and Paris.
If you are right, than Nalby in Rafa's draw in Wimby = end for Rafa. But then again Nalby rarely does what he is expected to... you were right for this Mahut match thought