Goals from Matthew James and recent recruit Davide Petrucci sealed a 2-0 home win for United's Academy Under-18s on Saturday.
The young Reds now have four points from their opening two fixtures after beginning the season with a 0-0 draw away to West Ham.
Promising Italian midfielder Petrucci, signed from AS Roma in the summer, played in a more advanced role behind fellow countryman Federico Macheda. And the 16-year-old found the breakthrough just after the break.
Petrucci opened the scoring in the 51st minute, before Reds skipper Matthew James made sure of the points 13 minutes from time.
Paul McGuinness' side will be in acton again next Saturday 6 September (1200 BST) when they host Middlesbrough at Carrington.
United: Devlin; Strickland, Gill, Brown, Wootton; Curran, Norwood, James, Stewart (Brady 69); Petrucci, Macheda.
Subs not used: Woods, Ajose, Brandao, Dean.