Shrewsbury manager Graham Turner felt aggrieved by the decision to award the late penalty which cost his side victory in the 2-2 draw at home to fellow promotion contenders Port Vale.
Referee Phil Gibbs pointed to the spot seven minutes from time after Mat Sadler had brought down Tom Pope, leaving Marc Richards to fire home his second of the night to salvage a share of the spoils.
"Given the decision that was made it's very, very frustrating," said Turner. "We've just had the opportunity to have a look at it on DVD and in slow motion and it was never a penalty."
He added: "For a start we don't think the referee had a good view of it. He's had to look around bodies.
"Mat Sadler was in front of the lad (Pope) and basically in control. I think the linesman has said to one of the players that in his view it wasn't a penalty so we're aggrieved by it and it's another couple of points dropped at home."
Vale boss Jim Gannon hailed the contribution of his captain Richards, whose brace took his personal tally for the season to 17.
"Marc's a very strong-minded player and it's great for him to be able to put the penalty away, get two goals, right in front of our fans and to be able to send them home happy," said Gannon.
"If he hadn't missed the games he has this season (through a thigh injury) I think he would be among the division's top scorers. He can certainly catch up and two goals here can really whet his appetite to finish the season strongly.
"It was a well-deserved point but I'm not sure we did enough and played well enough to deserve a win, but we certainly didn't deserve to lose.
"It wasn't a great game of football but there was certainly lots of endeavour and passion and there was lots of incident which has made it feel entertaining."
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