Blackpool boss Simon Grayson has tore into the referee who awarded a controversial penalty for Sheffield United as the Blades claimed a 3-1 win.
Stephen Quinn had given the South Yorkshire side the lead before Blackpool defender Shaun Barker was penalised for pulling Ugo Ehiogu's shirt.
Gary Speed converted the resulting penalty at Bloomfield Road, and although Steve Kabba pulled one back against his old club, Greg Halford put the result beyond doubt to take the Blades into fifth place in the Coca-Cola Championship.
However Grayson was furious, saying: "It was never a penalty.
"I have watched the DVD and can not understand how the referee came to his decision.
"I have been to see the ref and given him my point of view.
"I don't want to get into trouble over this but it was a case of two players rightly competing for the ball."
The Seasiders' manager also said that if they were going to survive in the division, they have to be more "ruthless".
He added: "People in this division punish your mistakes but what we are doing is not punishing their mistakes.
"You only have to look at the quality available to clubs like Sheffield United as against the smaller clubs like ourselves.
"However, I thought we more than matched them going forwards and played some good football at times."
Opposite number Kevin Blackwell disagreed over the controversial penalty decision which put the Blades into the lead, claiming it was correct.
He said: "I have no doubt it was a penalty. There was a lot of pushing and shoving at the corner and the ref says he saw a shirt being pulled.
"I thought this was a good result for us because Blackpool are a workmanlike side and this is a difficult place to come to.
"I thought we controlled the game well and got players forward in numbers.
"We have some good players like Jon Stead and James Beattie coming back after injury so there is pressure on places and that is what I want."