Goals from Jake Wright and Shea Gordon helped United's U21s to a deserved victory over Bolton Wanderers at Bramall Lane on Tuesday afternoon.
The goals came early in each half, but United were indebted to several fine saves from goalkeeper Aaron Ramsdale, as the Blades extended their unbeaten run in the Professional Development League to 16 matches.
In an end-to-end start it was the visitors who had the first chance as Cvetko headed over from a Lussey corner, at the other end, Kennedy headed wide for the Blades from Brooks's inviting set-piece.
In the 11th minute the hosts took the lead with a fine sweeping move that began deep in their own half. Gilmour, Charlesworth and Brooks exchanged passes on the right before the latter's sweeping cross sent Brown clear down the left, his near post cross was then converted by the onrushing WRIGHT who got across his mark to volley home.
Ten minutes later the advantage should have been doubled, but having combined with Hall, Kimarni Smith was denied by Campbell in the Wanderers goal and for the remainder of the half it was the visitors doing all the attacking.
But Ramsdale was in fine form, firstly he produced a strong one handed save to his left to deny Newell and from the resulting corner Thomas headed inches wide. United's goalkeeper then denied Newell again, before standing tall to block from the advancing Thomas.
As half-time approached, Wanderers hit the post twice in quick succession, firstly through captain Finney, before Newell was denied by the post from Spooner's cross.
United were quickly out of the blocks in the second-half and in the 53rd minute got a decisive second goal, as GORDON succeed where Hall and Wright had failed in getting a clean shot on goal, which gave Campbell no chance.
The Trotters to their credit continued to press forward and Ramsdale was again at his best to beat away Walker's powerful effort, before saving a Phillips header from Walker's inswinging free-kick on the right.
The Blades controlled the game better thereafter without creating too many goalscoring opportunities, although substitute Litchfield headed narrowly wide at the near post from an excellent Charlesworth cross from the right.
In the end though, the home side got another win and Ramsdale rightly so took the applause from the crowd as he left the field.
Blades: Ramsdale, Charlesworth, Brown, Gilmour, Kennedy (Adebowale 88), Semple, Brooks, Gordon, Wright (T. Smith 82), Hall (Litchfield 61) K. Smith.
Unused: Eastwood, Hallam.