Eddie Nketiah continued his prolific form in the Carabao Cup with a clinical hat-trick as Arsenal saw off League One Sunderland to book their spot in the semi-finals.
The forward turned in from close range to open the scoring after Rob Holding's header was palmed into his path and Nicolas Pepe soon doubled the hosts' lead.
That looked to have put the Gunners in control only for Sunderland to hit back when Nathan Broadhead coolly clipped over the onrushing Bernd Leno from Elliot Embleton's superbly-weighted pass.
But Nketiah cleverly turned in a low Nuno Tavares cross straight after the break to re-establish the lead.