Both Materazzi and Burdisso come of the pitch before the break in the game at Genoa on Saturday.
The injuries could leave Jose Mourinho short of options in defence ahead of their visit to Old Trafford.
Both Materazzi and Burdisso come of the pitch before the break in the game at Genoa on Saturday.
The injuries could leave Jose Mourinho short of options in defence ahead of their visit to Old Trafford.
