Liverpool maintained their 5 point lead at the top of the Premier League after the early kick off on a League Saturday.
The reds travelled back to Bramall Lane looking for their first victory there in over 29 years - thanks primarily to Sheffield United's expert avoidance of England's top division.
Liverpool had scored just once in their past three trips to this ground, and so again it proved a difficult encounter. The reds won thanks to a goalkeeping error, but should likely have made sure of the points much earlier. A misfiring front three the reds most significant problem on the day.
It was a changed Liverpool from midweek, but an unchanged one from the last Premier League game v Chelsea. Divock Origi returned to the matchday squad after his recent ankle injury proved to have not been as serious as expected.
From the first whistle the reds applied huge pressure in the South Yorkshire sunshine, before a quick counter attack allowed the home side to test the reds keeper.
Sadio Mane hit the post, and had a very good shout for a penalty waved away from the Mancunian referee Anthony Taylor.
Liverpool huffed and puffed throughout the half and Henderson went down for two significant challenges before he was withdrawn for Divock Origi - a bold change by the Liverpool manager looking for all three points.
Eventually it was a drilled shot from the edge of the area by Gini Wijnaldum that separated the two teams. Man Utd's on loan goalkeeper Dean Henderson couldn't stop the power of the shot and it squirmed through his legs.
Mo Salah should have added another with his one on one but this time Henderson did enough to make his goal look small. At the other end Adrian had to save low from McBurnie and Lundstram put the ball over the crossbar in the dying stages.
A sloppy performance from the reds, but the crucial stat is likely to be a 7 straight win this season, a 16th consecutive Premier League win and 21 points at the top of the table in September.