By Jamie Spencer Liverpool finished the Champions League group stage by inflicting a first defeat of the season on a Napoli side that had beaten them comfortably in the reverse fixture. Mohamed Salah, who moved level with Steven Gerrard on 41 Liverpool goals in European competition, eventually broke the deadlock for the Reds, before Darwin Nunez doubled the lead deep into a lengthy period of stoppage time. Napoli also had a goal disallowed at 0-0. The first half was a hard fought but close affair. Possession was pretty even and neither side created that much in the way of clear chances to scor…