Arsenal manager Mikel Arteta says he "doesn't understand" why Video Assistant Referees are not used in the Europa League after his side were denied what looked like a legal goal against Molde on Thursday evening.
The Gunners beat the Norwegian side 4-1 to continue their 100 per cent start to the competition but suffered a scare when the visitors took the lead after 22 minutes courtesy of Martin Ellingsen's strike.
Arsenal thought they had equalised soon after when Nketiah turned in a low cross although it was flagged for offside.
Editors' Picks
While Nketiah's team-mate Joe Willock was in an offside position when the ball was played in, he did not make contact with the ball and was not directly involved in the goal.