Olivier Giroud’s stunning late strike gave Arsenal victory at 10-man Crvena Zvezda and kept them firmly on course to reach the Europa League knockout stage.
Giroud produced the game’s one moment of quality with an inventive overhead flick to hook the ball into the net.
The goal came minutes after Milan Rodic was shown a second yellow card for a foul on Francis Coquelin.
Richmond Boakye hit the post for the hosts in the first half.
Arsenal is top of Group H with nine points, four ahead of second-placed BATE Borisov.