United turned on the style as an injury-hit side destroyed Swansea City 5-1 at the Liberty Stadium to progress to the quarter-finals of the FA Youth Cup.
A stunning first-half display saw the Reds take a three-goal lead into the break courtesy of Jack Barmby, Gyliano van Velzen and Sam Byrne. After van Velzen notched his second four minutes after the interval, Jimmy Loveridge's volley was only ever going to be a consolation and Tyler Blackett blasted in a late howitzer from a short free-kick.
Van Velzen, in probably his most impressive performance of the season, lashed an early shot wide while Barmby was a constant threat - cracking a couple of efforts off target. Loveridge headed over from close range and Jonny Sutherland tipped away a Nathan Waters drive but Barmby again showed his prowess at the other end by forcing a brave stop out of Oliver Davies.
Barmby was not to be denied as he latched onto a hopeful ball forward by Nicolas Ioannou, beat Davies outside the keeper's area and found the net with his trusty left foot for his ninth goal from his last 10 games. Moments later, Mats Daehli raced onto a Barmby pass, with replays showing he was just onside, and squared unselfishly for van Velzen to tap in.
There was still time before the interval for Barmby to play a one-two with van Velzen and see his shot spin off Byrne's heel and into the path of the Irish striker, who made the most of the good fortune by tucking past Davies for a third in a devastating spell of football by the visitors.
After Loveridge spurned a glorious opening right at the start of the second half, van Velzen effectively killed the tie as a contest by producing a slide-rule finish with his left foot following a fine run by full-back James Weir.
A loose header by captain Blackett allowed Loveridge to pull one back by chesting to volley past