Materazzi fractured his cheekbone in the 2-1 defeat at Werder Bremen in the Champions League on Tuesday.
The Italy international recieved an elbow in the face from Werder Bremen ace Rosenborg in the first half.
Inter coach Jose Mourinho said: “Materazzi has fractured his cheekbone and obviously that is also negative, but we end the group with only Balotelli on a yellow card.”
