Arsenal's Max Dowman lifts his shirt over his mouth after being sent off against Fleetwood in the Carabao CupImage source, Getty Images
Image caption, Max Dowman made his second start of the season against Fleetwood
The 16-year-old midfielder was shown a straight red card in the 85th minute after reacting to a heavy challenge by Fleetwood's Harrison Neal.
Although Dowman did not fully kick out, his foot did make contact with Neal.
The game finished 1-1 before League Two Fleetwood beat the Premier League champions 5-3 on penalties.
It was Dowman's second red card this month having also been sent off while representing England's Under-19s.
As Dowman left the field, Arsenal boss Mikel Arteta gave him a scathing look and made what appeared to be an angry comment to the youngster.
More to follow.