Gabriel Martinelli had his goal disallowed by VAR in the first-half.
The Gunners lost 3-1 to Man United at Old Trafford last night and tasted their first defeat of the new campaign.
Manager Mikel Arteta believed there was a lack of consistency with the refereeing decisions this season.
Arteta told Sky Sports: “Lack of consistency. One is soft and last week they made a foul on Aaron but it is soft, it is not a foul.
“There is a foul on Bukayo [Saka], it is soft but not a penalty. Today it is a foul.
“The threshold in the first actions, you could see there is no yellow card because they want to keep a threshold in a big game. Really difficult to understand.”
Mikel Arteta claims his side deserved more and didn’t take their chances in front of the goal.
Arteta added: “I am really disappointed to lose the game especially with the way it went over the 95 minutes.
“We had some big periods where we were totally dominant and in total control. We created chance after chance but did not close the game. In any moment, when they have open spaces, they are going to hurt you.
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