I think it's a good thing he has pulled out of Rome. If he picked up an injury then he needs to heal. I think it's more likely though that he is working on his head. He shouldn't have lost that last match, especially as he was winning all his service games easily until he served for the match. If he can't close out matches then he and his coach need to take time out to work on the problem. If he comes back with a better attitude then it will have been a wise decision.