
What had been a compelling clash with little between the sides became an Arsenal rout with goals by Gabriel, Gabriel Martinelli and a brace from Viktor Gyokeres leaving Diego Simeone’s side shell-shocked.
Shortly after Julian Alvarez hit the crossbar for the visitors, Gabriel broke the deadlock by heading in a Declan Rice free kick in the 57th minute.
Martinelli finished off a sweeping move seven minutes later and Gyokeres then prodded his first goal of the night via a deflection as Arsenal ran riot, the Swede ending a nine-game scoring drought for club and country.
Gyokeres then bundled in his second as Atletico were again unable to deal with a set piece.
Victory extended Arsenal’s unbeaten run to nine games and put them on nine points in the group phase, well on the way to qualifying for the knockout phase.
Atletico have three points and will have to dust themselves down after their six-game unbeaten run in all competitions came to an abrupt end.