Fleetwood Town beat Arsenal 5-3 on penalties in the League Cup fourth round after holding them to a 1-1 draw in normal time tonight.
The Gunners became the first defending Premier League champions to be knocked out of the competition by a fourth-tier side.
This was only the second time the Gunners had been eliminated by a fourth-tier side, after losing to Bradford City on penalties in the 2012/13 season.
Arsenal started the stronger side, but Fleetwood broke the deadlock in the 21st minute.
Aaron Loupalo-Bi drove past teenage centre-back Marli Salmon before slotting the ball into the far corner.
Arsenal responded positively to going behind, but could not break down the hosts' resolute defence.
Viktor Gyokeres restored parity in the 50th minute, scrambling the ball home from close range after Ceedach O'Neill's delivery into the box.
Kai Havertz squandered a good chance to complete the turnaround. The ball fell kindly to the German, whose effort was blocked by Rhys Bennett.
Havertz wasted another opportunity, firing the ball into the side netting from a promising position.
Five minutes from the end, Max Dowman was sent off for unsporting behaviour. It was Arsenal's first red card in the competition in five years.
Mikel Arteta's side created chances to score a late winner but were not clinical, sending the game to penalties.
Arsenal converted their first three spot-kicks, but Jay Lynch saved Bruno Guimaraes' effort.
Fleetwood converted all five penalties to secure a 5-3 shoot-out victory and reach the League Cup quarter-finals for the first time.
