perhaps it is just me, but apart from 2 mistakes knezevic was pretty decent ...
This is true, but maybe it's a reason to worry because he had a similar match against Napoli (although he wasn't as decent as today) and he made usless sliding tackles in the pre-season also.
In this aspect he reminds me of Boumsong. Boum Boum also played great in some matches but he always made his usual terrible mistake and everything he did till that moment was forgotten.
I don't like these kind of defenders who lose concentration. Defenders and the goalkeeper are the ones who must always be fully concentrated and Knezevic is losing it during certain parts of the match (he was awful at the end both against Napoli and Bologna).
Such a shame. As a Croat i'd have been thrilled if he proved everyone wrong, but he's doing the opposite so far.