Inter Milan defender Marco Materazzi has told teammate Mario Balotelli to grow up. The young striker had another blazing row with coach Jose Mourinho during this week's Coppa Italia win over Fiorentina.

"Mario is a big kid who always wants to play," warned veteran teammate Materazzi.

"He's too childish. When we talk, I tell him that he should be more like me. I too would like to play all the time, but I can't and I accept it."