According to the Evening Standard, Arsenal should have handed the Red Devils an allocation of 9,000 tickets for the match. This would have represented 15% of the Gunners' 60,000-capacity Emirates Stadium.
However, only 7,956 Man United supporters were permitted into the stadium and therefore complaints were made despite United winning the game on penalties in the end thanks to a Joshua Zirkzee finish to make it 5-3.
Despite this, The Gunners could avoid the fine if they confirm that they can adhere to the ticketing requirements for their third-round game in this season's FA Cup and continued compliance for any further rounds of this season’s competition.
The win saw United progress to the fourth round, where they beat Leicester City at home, before being eliminated on penalties by Fulham in the fifth round in what was a poor cup run from the 13 time winners.
Arsenal have failed to advance past the fourth round of the FA Cup since beating Chelsea in the 2019-20 final. Manager Mikel Arteta is sure to want to push further this season as he hopes to break his trophy duck.