Napoli's 5-0 defeat to Barcelona was a double blow, as Miguel Angel Britos picked up an injury that will keep him out for two months.
The former Bologna centre-back fractured the fifth metatarsal bone in his right foot during last night's Gamper Trophy loss at the Nou Camp.
He underwent surgery this morning in Barcelona at the hands of Professor Eugenio Jimeno, confirmed the club.
Britos is expected to be out of action for somewhere between six and eight weeks.
Napoli had only just spent €8m to sign the Uruguayan international.