Napoli were impressive during the group stage, remaining unbeaten in their six matches, which included a 2-0 triumph over Liverpool on home soil. Gennaro Gattuso's men enter tonight's contest in good form, winning their last three matches on the bounce. They're off the pace for the top four in Serie A, but they have beaten Cagliari and Brescia to provide momentum to take on Barca and spring an upset on the Spanish outfit.