Carney Chukwuemeka and Noni Madueke scored twice in extra time to hold off a Leicester City comeback and advance to the FA Cup semi-finals.
Marc Cucurella had opened the scoring in the 13th minute, and the in-form Cole Palmer doubled the lead in additional time after Raheem Sterling missed a penalty.
ALSO READ: FA Cup Fourth Round: Tottenham to face Man City, Chelsea to battle Aston Villa [Full Draw]
Despite being 2-0 down at halftime, the Foxes rallied to draw level on 62 minutes, with Axel Disasi scoring an own goal before Stephy Mavididi made it 2-2 with a superb solo effort.
ALSO READ: FA Cup: Liverpool knock Arsenal out with two late goals
Late substitutes Chukwuemeka and Madueke then scored twice in extra time to seal a nail-biting victory in a game that swung back and forth numerous times, with the Foxes finishing with 10 men.