It would not have been completely out of reach, he was serving well for the most part, but he could not convert enough balls from the baseline. And also not punish often enough shorter balls of Blake. Blake was being a bit more aggressive in the rallies mostly and he got the deciding breaks in each set (an early and a late one).
Now after Nadal and Youzhny lost, his quarter would have opened up quite nicely
Lets hope he is improving that soon!