WATCH: Referee rules out goal to allow substitution and Leeds United fans went ballistic

For Championship clubs, football can often be a game of very narrow margins.

That makes refereeing mistakes all the more significant, especially for teams on a poor run. Leeds United were winless in four league games going into their meeting with Sheffield Wednesday, and after going 2-0 down they thought they'd restored some hope when Liam Cooper turned home a free-kick. https://twitter.com/FootballOn5/status/688409142919180289 But, despite initially awarding the goal, the referee then decided to rule it out... to let Wednesday make a substitution. https://twitter.com/WALMOT3/status/688365420521349121 Naturally, it didn't go down too well.

Fans of the away side were incensed.

https://twitter.com/jacktimms92/status/688367124939730944

Really incensed.

https://twitter.com/TomFoy_/status/688367776369631233

Many were unsurprised.

https://twitter.com/awinehouse1/status/688363263252385792

There was some of the usual wisecracking.

https://twitter.com/EamoV1/status/688364870673285120 https://twitter.com/MrPaulRobinson/status/688366906798116864

But others took it in their stride.

https://twitter.com/lufc_dan/status/688363838127927297