His card management was atrocious (Fernandinho not getting at least a yellow card is a laughable travesty) and in turn it allowed the game to become a bigger scrap then it should have been... but I would say most of the fouls were fouls, and he got the penalty spot on (not a red card, Luiz was getting their first).
So yeah, not a fix... at most a general home bias you get anywhere, but that's to be expected.