Teenage striker Eddie Nketiah came off the bench to score twice on his home debut and send Arsenal into the quarter-finals of the Carabao Cup at the expense of Norwich.
The England Under-19 international had played just a minute of first-team football for the Gunners before his introduction saw Arsenal come from behind and win 2-1 after extra-time.
Josh Murphy put Norwich ahead with a deft chip, his fourth goal in the competition this season, but the Canaries were guilty of wasting a host of chances to kill off the tie.
Nketiah, 18, then equalised with his first professional goal just 15 seconds after coming off the bench.