Against bayer he just got back from injury. And the whole team is no up to its standard, so why single out one player, when almost all of them are playing bad? Lets not blame one person, because IMO the whole team weren't good including Ferrara.
And you surely would agree that there is some truth in what I said. Because even befoure this match there were people saying and agreeing that Diego transfer was a steal. And now suddenly he is pure "shit". That can't be right. Marchisio is perfect example of this. Everyone is praising him as the next best thing, and when he has a bad game most of them all say he shouldn't even start, then next match he plays great again, and he becomes the saviour again.
Some people should show some consistency and not jumping from one extreme to the other(from best to worst, and vice-versa)
Although I agree with you that Diego should step up his game more.