Arsenal fans bemoaned a chaotic two-minute period in their clash with West Ham that saw Bukayo Saka miss a penalty, before Jarrod Bowen equalised.
The Gunners raced into a 2-0 lead within the first 10 minutes in the encounter at the London Stadium thanks to goals from Gabriel Jesus and Martin Odegaard.
They appeared to be cruising before the Hammers were awarded a penalty after Gabriel fouled Lucas Paqueta, with Said Benrahma making no mistake from the spot.
The lifeline gave the struggling hosts a boost and they started the second half brightly, but disaster struck when Michail Antonio was adjudged to have handled Gabriel Martinelli's shot.