Barnsley ended a run of three League One games without a win as a Sam Winnall goal gave them victory at South Yorkshire rivals Sheffield United.
The home side went close to scoring after only eight minutes when Craig Alcock's header was scrambled off the line by Tykes keeper Ross Turnbull.
Winnall sent an effort over and had a shot deflected wide before getting the winner after 56 minutes.
The Barnsley striker met a James Bailey corner and scored with a firm header.
Sheffield United boss Nigel Clough told BBC Radio Sheffield:
Nigel Clough: Sheffield United manager on Barnsley loss
"Generally it was a good performance again. We had lots of situations and chances and half chances.
"We switch off from one corner and concede the goal. Fine margins in any level of football, especially the higher you go, can be the difference.
"I thought we got enough of the ball to Jamie Murphy and Jamal Campbell-Ryce, I just don't think they produced today.
"There won't be any hysteria from us. We don't like losing, especially at home, but we know what the problems are."
Barnsley manager Danny Wilson told BBC Radio Sheffield:
Danny Wilson: Barnsley manager on Sheffield United win
"You've seen a typical derby here today with two very committed sides.
"We know this league and we know how tight it is and nobody can take anything for granted. Today proves that.
"They had a lot of balls into our box and defensively I thought we were fantastic.
"I don't make any excuses for needing a bit of luck today because I think we have earned that."
