They're at it again. Leicester City have taken the lead at The Emirates, after Jamie Vardy won and scored a penalty just before half time.
Martin Atkinson pointed to the spot after the 29-year-old drew a foul from Nacho Monreal.
Here's how Twitter reacted...
Some debated whether Monreal's challenge was worthy of a penalty, with Arsenal fans (and others) claiming the referee was having a game to forget.
https://twitter.com/Rexyy92/status/698852241634156544
https://twitter.com/FansofArsenal2/status/698851731338350592
https://twitter.com/TommyWHUFC/status/698850914690580481
Others were more concerned with another decision that should have been given at the other end of the field.
https://twitter.com/Ian_Cruise/status/698850797505941504
But plenty believed Martin Atkinson was right to point to the spot...
https://twitter.com/soalawhite/status/698851375871094786
https://twitter.com/aaronelli/status/698851377997574144