Arsenal and Brighton fans clashed over whether Joao Pedro should have been awarded a penalty that rescued a 1-1 draw against Arsenal on Saturday evening.
The Gunners saw their Premier League title hopes again dented as the Seagulls came from behind to take a point that leaves Arsenal five points adrift of leaders Liverpool with the Reds set to play Man United on Sunday.
A moment of controversy in the second-half of Arsenal's clash at the Amex occurred when a strong piece of build-up play resulted in Pedro attempting to get his head to a bouncing ball.