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.
Arsenal are through after a 2-0 loss to Napoli.
Defensive rock Per Mertesacker was dejected at full-time due to the defeat to Napoli despite seeing Arsenal progress into Champions League knockout stage.
Leandro Damiao looks set to join Santos in January after a deal was struck between Internacional and a third party.
West Ham United vice-chairman Karren Brady has been discussing the club's big move for Portugal midfielder William Carvalho.
Tottenham are keen on former Manchester City youngster Denis Suarez.
Leeds United have completed the signing of Bryce Hosannah, who will link up with their under-23 squad.
Tottenham Hotspur are attempting to sign Celta Vigo midfielder Pape Cheikh Diop.
Tottenham face Chelsea this weekend.
Leeds United were unable to beat Fulham in Championship action at Elland Road last night.
Newcastle are reportedly keen on Genoa's Diego Laxalt.
Dowell will spend the 2017-18 campaign on loan to Nottingham Forest from Everton.
Swansea City are said to want the Celtic midfielder as a replacement for the Everton-bound Gylfi Sigurdsson.
Liverpool lead Tottenham Hotspur in the race to sign Leicester City's Riyad Mahrez, according to the bookies.