The majority would have been laying into him for weeks now had the opposition been more clinical from a Bonucci mistake. I can still remember the mistakes he survived from the Fiorentina, Palermo and Lazio matches. Doesn't matter if he gets 90% of passes correct or not, he's still a liability when one of those passes gifts Ilicic or Rocchi a shot at goal.
Bonucci is a CB, so his main job is to defend.
He frequently makes mistakes when defending and that is what he should be criticised for, primarily.
