Ever the pantomime villain, Mike Dean managed to annoy half of north London as Sheffield United downed Arsenal 1-0 on Monday night, thanks to a first-half goal from Lys Mousset.
Numerous marginal decision went the way of the hosts at Bramall Lane, infuriating the Arsenal fan-base on social media.
Here's how Twitter reacted throughout the contest from kick-off to conclusion...
'Brian Nel' was lucky to get even a single retweet as fans prepared for the clash...
It seems good old Brian wasn't the only Gooner who was left disappointed by Unai Emery's lineup in Yorkshire.