Arsenal have been fined £20,000 after accepting a Football Association charge for failing to ensure their players conducted themselves in an orderly fashion against Manchester City.
In Saturday's home defeat, Gunners defender Gabriel was sent off after receiving a second yellow card.
The Brazilian was booked twice inside two minutes as City came from behind to win 2-1.
Shortly before the second booking, City were awarded a penalty.
Referee Stuart Attwell overturned his initial decision and gave the spot-kick after viewing the pitchside monitor.
And, just a minute after conceding from the spot, Gabriel was dismissed.