Red Star was extremely organized in defense all game, but they also began threatening Arsenal's backline in the second half getting most of the chances. And part of the package for opposition teams when they come to the Serbian capital to play Red Star, is the tunnel walk like no other.
Richmond Boakye hit the post for the hosts in the first half.
Arsenal's next Europa league game is on November 2nd at the Emirates again against Red Star.
Arsenal improved in the second half which wasn't hard given how poor they were in the first.
Such was Red Star's pressure that veteran keeper Petr Cech had to roll back the years to produce a fine save to keep it at 0-0.
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Both sides have a number of injuries heading into the game, but Arsenal's squad depth could be a major deciding factor. The Gunners are hopeful that Sead Kolasinac will be okay despite being forced off at half time for Bosnia on Tuesday.
Real Sociedad hammered FK Vardar 6-0 with the help of four goals from Brazilian forward Willian Jose, while fellow Liga side Athletic Bilbao were left on the brink of elimination as they drew 2-2 at Swedish side Ostersund.
Nelson, one of the only Arsenal players who looked interested in winning the game, had a fierce shot parried away by Borjan. Another let-off for Arsenal.
Five minutes later, Arsenal made their man advantage pay.
The goal livened up what had been a dire game and saw Arsenal strengthen their grip on Europa League Group H by maintaining their 100% record in the tournament.
Theo Walcott was the biggest culprit of the night, along with Giroud, as both forwards failed to finish off moves instigated by the brilliant Jack Wilshere. Walcott played a one-two with Wilshere who flicked the ball back to Walcott who headed it across goal.