Arsenal may have lost in the San Paolo but avoided elimination by keeping the score to two goals.
After Napoli's heartbreaking Champions League exit, owner Aurelio de Laurentiis has asserted that the Partnopei need a bigger squad.
Liverpool, Manchester United, Tottenham, Chelsea and Arsenal all feature.
Gonzalo Higuain is in disbelief that Napoli were eliminated from the Champions League despite a strong record.
Here are the five teams Manchester United could face in the Champions League knockout phase.
Arsenal fell to Napoli by a matching scoreline to their prior victory over the Partenopei at the Emirates, but secured qualification to the knockout stages nonetheless.
Chelsea striker Demba Ba scored the winner against Steaua Bucharest which ensured Mourinho's men earned top spot.
Arsenal manager Arsene Wenger believes the dismissal to Arteta was a stringent punishment.
The eldest player in the Arsenal squad at 33, Tomas Rosicky was picked from the start in their crucial Champions League game.
Chelsea finished top of their group, and will now hope to reap the rewards in the Champions League knockout phase.