Sheffield United moved into second place in the Championship after recording a huge win over Yorkshire rivals and fellow promotion contenders Leeds United at Elland Road.
Leeds dominated for most of the game but Chris Basham’s second half strike broke the deadlock to give the away side the advantage with 20 minutes to go.
The Whites tried to rally a late comeback but were dealt a blow when goalkeeper Kiko Casilla was sent off in the 91st minute for a challenge on Billy Sharp.
Leeds now move down into third on 73 points, with the Blades a point above them.
Sheffield United coach Chris Wilder said: “It was a backs against the wall performance, a bit of a smash and grab.
“It was a tough test for us but we’re delighted to get the result against the run of play to get the result.
“We’re in the mix and that’s probably confirmed our play-off place but our fans may want a little more.”
Leeds United coach Marcelo Bielsa said: “Nobody is saying it’s a crucial result because there are still 24 points at stake but we can’t deny that it was important.
“We had the resources to take a different result, we prepared well enough not to depend on the referee, luck or opponent.”