Three points were required from the Merseyside giants if they were to return to the top of the table at Anfield, having been bumped down to second spot by virtue of Arsenal's win over Luton Town on Wednesday.
Liverpool struggled to find their rhythm in the early stages, but they nevertheless went into the break a goal to the good in bizarre circumstances, as Darwin Nunez charged down Ivo Grbic's clearance and saw the ball roll into the empty goal off his backside.
However, Klopp's men were still a shadow of their scintillating best, and Chris Wilder's basement boys pegged them back 13 minutes into the second half, as Conor Bradley diverted Gustavo Hamer's header into his own net.
The Blades' reprieve was short-lived, though, as the ball broke kindly for Mac Allister on the edge of the box midway through the second period, and the Argentine unleashed a rocket into the top corner in front of the Kop.
Klopp on «absolutely insane» Mac Allister displayThe midfielder's astounding effort evoked memories of his equally wonderful strike against Fulham earlier in the campaign, and after Mac Allister had reignited the Reds' fire, Cody Gakpo netted the insurance goal with seconds of normal time remaining.
In between his screamer and Gakpo's header, Mac Allister also crashed a stunning free kick off the bar, and Klopp credited the ex-Brighton & Hove Albion man with scoring the best two goals in the current Premier League campaign.
«He is a really good player, in the first half he was playing six but we knew we could move him slightly higher,» Klopp
Read on sportsmole.co.uk