Craig Brown was in no mood to forgive Richard Foster for the "suicide" he believes handed Celtic an undeserved 1-0 victory over Aberdeen at Pittodrie.
The Dons manager said that the defender believes he was fouled in the lead up to Anthony Stokes' winner.
"I think Richard Foster would admit that the extra touch he took on to his stronger leg allowed him to be dispossessed," said Brown.
"It is disappointing to commit suicide the way we did."
But Brown praised his side for the way they competed against many people's favourites for the Scottish Premier League title.
"I thought we did enough to get at least a draw in the game," he told BBC Scotland.
"I am very disappointed for the players. They put a lot of effort into it. I thought they aquitted themselves very well, but there are no points.
"The goal was the only shot on target that gave David Gonzalez anything to do.
"It was the same here against St Johnstone and Villarreal.
"I think we actually made the best chance of the game when Josh Magennis headed on to Darren Mackie, who crossed across the face of goal, and, if Scott Vernon had got a touch, it might have been a different result."
The defeat leaves Aberdeen with only one point from three games, but Brown is confident a victory will come once midfield trio Fraser Fyvie, Chris Clark and Ryan Jack, plus defender Youl Mawene, return to fitness.
"I am not in any way despondent or pessimistic," said the Dons boss.
"We can see the effort there and we are one or two first-team players short - Fyvie gives us a different dimension, Mawene at the back and Chris Clark in midfield as well, and Ryan Jack, an outstanding young player, so we are four short of what we might be.
"But every team suffers injuries and has a bad spell.
"We have lost our last two matches and hopefully that is our bad spell over."
Brown was pleased with the performance of summer signing Kari Arnason as a stand-in central defender.
"Arnison is an outstanding player and he will be better for us when we can get him into midfield because we are short of Mawene, who we signed to replace Zander Diamond," he added.
"When Mawene is fit and we can get Arnason into midfield, you can see the quality he has."