United won 3-1 with two goals in injury time, after goalkeeper Adam Davies had saved a second penalty from Wrexham striker Paul Mullin in an entertaining clash between two promotion-chasing sides in their respective divisions.
Here’s how we rated United’s players in the pulsating clash...
5. Jack Robinson 7
Got forward at will early in the game and a superb driven low cross caused havoc in the Wrexham area, before his header was blocked from the resulting corner. Defensively solid too, including a superb challenge - the type he probably dreams about at night - where he hared across and threw himself into it to win the 50/50 Photo: Michael Regan
6. Ben Osborn 7
Back at left wing-back after a run-out in midfield at Rotherham and took on corner duty, with lovely deliveries from the left-side leading to headers on goal for Robinson, Ahmedhodzic and then Egan. Brilliant pass led to Ahmedhodzic's opener Photo: PAUL ELLIS
7. Ismaila Coulibaly 7.5
A long-awaited first glimpse of the midfielder for Blades fans and an impressive one it was, too. He put his foot in when needed but also used the ball intelligently and was given a standing ovation when he made way for Norwood Photo: Mike Egerton
8. Sander Berge 7.5
Was not as involved in the game early on as you'd imagine a player of his stature to be but when he exploded into life he made his mark, driving from deep and playing perfectly-weighted passes that led to chances for Sharp and others. A superb finish late on to cap victory too Photo: Gary Oakley