Iliman Ndiaye's early opener looked set to lay the platform for a comfortable victory for a Blades side who were dominant early on and should have been two or three ahead at the break.
But Wigan had chances of their own, with Wes Foderingham making a smart save from Thelo Aasgaard and substitute Josh Magennis wasting a couple of good opportunities after coming off the bench.
Here’s how we rated United’s players as they strengthened their grip on second place ahead of Monday’s trip to champions-elect Burnley...
13. Subs: Oli McBurnie 6
Came on for Sharp and linked up well with Ndiaye and Ahmedhodzic for a chance which was deflected wide. Otherwise the ball didn't really drop how he would have wanted Photo: Simon Bellis
14. Ollie Norwood n/a
Replaced McAtee and allowed Doyle to operate a bit higher up the pitch. Wasn't a million miles away with a delicate and audacious chipped attempt later in the game Photo: Simon Bellis
15. John Fleck n/a
Came on for Doyle for the final 12 minutes or so of normal time and had a big penalty appeal turned down just moments later after being tugged back in the area after busting a gut to meet McBurnie's pass. Showed real composure to set up Ndiaye for a late chance Photo: Andrew Yates