The Blades went two ahead with quickfire goals from Sander Berge and Billy Sharp in the first half, with Jack Robinson and the superb Morgan Gibbs-White on target in the second.
Boro got on the scoresheet through Folarin Balogun, after a rare slip from Wes Foderingham, but United were full value for a rousing victory against a serious promotion rival – managed by their old boss Chris Wilder, who was given a good reception on his return to his boyhood club ahead of kick-off.
But who was United’s man of the match? Click through our photo gallery to see our man’s ratings – including a VERY rare perfect 10 …
9. John Fleck 6
Didn't make it to half time as he pulled up with an injury, adding to United's fitness concerns for the season run-in Photo: Andrew Yates
10. Morgan Gibbs-White 10
Did superbly for Sharp's goal as he ate up the ground and committed defenders and goalkeeper before squaring at the last second. Booked for his part in Sharp's melee with Peltier and then scored a stunning goal for the fourth. A joy to watch when in full flight and a VERY rare 10/10 rating Photo: Andrew Yates
11. Billy Sharp 8
Scores goals again. Booked for his part in a bit of handbags with Lee Peltier just in front of the dugouts and ran his blood to water for the team before being replaced to a deserved standing ovation Photo: Isaac Parkin
