Samuel Chukwueze came off the bench to end Newcastle's Champions League adventure as AC Milan fought back from a goal down to win at St James' Park.
Manchester City beat Red Star Belgrade 3-2 in the Champions League after goals from Micah Hamilton and Oscar Bobb.
Mikel Arteta believes his Arsenal side have shown enough in the group stage to prove they can compete back in the Champions League.
Erling Haaland was not involved as Manchester City trained in front of media cameras prior to their Champions League trip to Red Star Belgrade.
Mauricio Pochettino believes Chelsea need more transfer window surgery in January to lift them out of the malaise which has left them 12th in the table and well adrift of Champions League qualification.
In a Champions League clash, Real Madrid secured a 4-2 victory against Napoli, with the spotlight shining brightly on the emergence of Nico Paz.