United's youngsters slipped to a disappointing defeat against Nottingham Forest at Shirecliffe on Saturday - despite a spirited second-half fightback.
The Blades conceded three first-half goals to give themselves a mountain to climb and despite goals from substitute Daniel Cockerline and Otis Khan, the youngsters slipped to a narrow defeat.
Forest started the game brightly and scored in the fourth minute, from a well-worked set-piece United failed to mark up and the visitors headed home at the back post.
They doubled their lead in the 15th minute after capitilising on a misplaced pass, before a third came on the half hour mark when a corner wasn't dealt with properly.
For the hosts, Khan was a constant threat and drew a good save from the visiting goalkeeper, before Wright shot wide after linking up with the instrumental Khan.
After the break, United produced a fantastic performance; Coustrain rattled the woodwork within two minutes of the restart. COCKERLINE scored with his first touch after replacing Heh in the 56th minute, following an excellent delivery from Khan.
Ten minutes later KHAN reduced the arrears further with a wonderful solo run from just inside the Forest half, powering a shot past the outstretched arm of the goalkeeper from the edge of the area.
Cockerline and Coustrain both went close, before United were denied an equaliser late on by the assistant referee's flag. Wright bundled the ball home only for the flag to be raised as the ball had gone out of play.
Blades: Eastwood, Paling, Ptak (Kedman 56), Reed, Scarisbrick, Whiteman, Lewin (Cheeseman 77), Heh (Cockerline 56), Khan, Wright, Coustrain. Unused: Owen.