Manager Arsene Wenger made nine changes to his starting lineup, and the Gunners were largely below par against the Serbian league leaders.
Find out how all of the action unfolded in Serbia courtesy of Sports Mole's minute-by-minute updates below.
Wenger has again opted to fill his substitutes' bench with the younger crop. Goalkeeper David Ospina has been left in London, meaning that Matt Macey remains as deputy and Petr Cech retains his place between the sticks.
RED STAR BELGRADE XI: Borjan, Le Tallec, Rodic, Stojkovic, Savic, Krsticic, Kanga, Donald, Radonjic, Srnic, Boakye
ARSENAL XI: Cech; Debuchy, Holding, Elneny; Maitland-Niles, Coquelin, Nelson, Willock; Wilshere, Giroud, Walcott
If you would like to read our on-the-whistle match report, you can do so by clicking here. Goodbye for now.