Barca striker Zlatan Ibrahimovic revealed Materazzi clashed with Balotelli in the players' race on Tuesday night.
And Mino Raiola confirmed on Telelombardia: "What should he do if he gets kicked? Materazzi has literally attacked him. Ask his teammates about their relationship with Mario ...
"Mario is always under the magnifying glass.
"Yes, he definitely did wrong (throwing his shirt away), but he must not always be booed, he's only a boy. Yesterday, he started well and then from only one error he was immediately flooded with whistles."