Youngster O'Reilly scored twice in City's win over Plymouth Argyle in round five, but had to settle for a place on the bench at the Vitality Stadium.

However, he played a key role after coming on at half-time, swiftly teeing up Erling Haaland's equaliser then supplying a cute reverse pass from which fellow substitute Omar Marmoush scored the winner.

City had been gifted an early penalty when Tyler Adams handled in Bournemouth's box, only for Haaland to fluff his lines from 12 yards, sending a tame effort at Kepa Arrizabalaga.

Haaland saw another great chance go begging when he lobbed over when one-on-one with Kepa soon after, and City's frustration was compounded as Bournemouth went ahead in the 21st minute – Evanilson tapping home following a bad giveaway from Matheus Nunes.

Yet Pep Guardiola's introduction of O'Reilly in place of Abdukodir Khusanov sparked City back into life.

O'Reilly got in down the left and crossed for Haaland to tuck in at the back post four minutes after the restart, before Marmoush slotted under Kepa after some brilliant play from the 20 year-old on the edge of the area.

Ilkay Gundogan clipped the woodwork as City searched for a third, though the visitors were not made to pay for that miss as they booked their place in the last four for a seventh straight campaign.

Last year's runners-up will take on Nottingham Forest at Wembley for a place in the final.