muscle problem during training or warm-up. I guess he won't be a 100% this Tuesday so I hope Ranieri doesn't play him.
I'd play this:
Buffon
Grygera-Legrottaglie-Chiellini-Molinaro
Sissoko-Tiago-Marchisio
Nedved
Trezeguet-Del Piero
Amauri if needed in the 2nd half.