Emile Smith Rowe gave Arsenal the lead against Manchester United in bizarre fashion after finding the back of the net just after David De Gea went down injured.
As an Arsenal corner came in, United midfielder Fred stood on the foot of his team-mate who went down on the goal-line just as the ball came back out to Smith Rowe.
The England international struck from the edge of the box and found the net with De Gea lying in a heap on the ground.
There were several minutes of confusion as De Gea got back to his feet, with Amazon Prime commentator Ally McCoist saying the goal had to stand as there was nothing wrong with it.