Nigel Clough has warned his Sheffield United side that their promotion aspirations could be damaged if they continue to switch off at set-pieces.
United dropped to eighth in the League One table after Saturday’s 1-0 derby day defeat at home to Barnsley, which came courtesy of Sam Winnall’s unchallenged header from a corner.
And Clough, who saw his side drop two points less than a month ago against Leyton Orient in similar circumstances, said: “It was a nice little reminder that, if you don’t do your job at every single set play, you will be punished in this division.
“I think they’ve probably had two or three corners, and Mark Howard in goal has been largely untroubled for the vast majority of the game.
“But we’ve been undone from one set-piece, an we’ve lost the game.”
United must now turn their attentions to Saturday’s FA Cup first round game at Crewe.
“We’ve no midweek game,” Clough said, “but we’re about right for a rest.
“We’ve had a good run but now we’ve got to move on and start again, starting at Crewe on Saturday.”