Teenager Lewis Koumas scored on his debut and fellow 18-year-old Jayden Danns netted twice off the bench as Liverpool beat Southampton to set up an FA Cup quarter-final tie with Manchester United.
With injuries to a host of first-team players, Jurgen Klopp named six players aged 21 or younger in his starting XI and, just as in Sunday's Carabao Cup final, the youngsters did not let him down.
Southampton had a host of chances in the first half but having failed to make them count, they were punished when Koumas collected Bobby Clark's pass and found the bottom corner as his low shot deflected off Saints captain Jack Stephens a minute before the break.