Chiefs boss Dave Rennie described a television match official's decision as "unacceptable" in his side's loss to the Hurricanes in Wellington on Saturday.
Rennie was referring to TMO Vinny Munro's decision not to award a try to replacement scrum-half August Pulu in the closing moments of the New Zealand derby which the tabletopping Hurricanes won 22-18.
After reviewing the incident, Munro ruled that Chiefs openside flanker Sam Cane had knocked the ball on before Pulu dotted down.
"The decision making right at the end of the game was massive wasn't it," said Rennie.
"You've got a Hurricanes player lying on the ground who played the ball back, it was regathered by our guys and we scored.
"I've looked at it 10 times and I can't see how the Hurricanes get a scrum out of that, the guy on the ground is deliberately playing the ball.
"It was a defining moment of the game and when it goes up stairs the decision making should have been better.
"I don't think it's acceptable."
Rennie also expressed his disappointment at two other decisions which he believed cost his team the match.
"There's an enormous amount of character in this team, but we're bloody grumpy," he added.
"It doesn't change the results. We have to look at ourselves and say we need to be better in certain areas, but they're a tough side and you need a bit of luck to go your way.
"I don't want to take anything away from them… but these are season defining moments and I'm disappointed with the decision making."
Hurricanes head coach Chris Boyd gave a diplomatic answer when asked for his opinion on Munro's late decision.
"I'm not in a position to comment [on the last TWO call] cos I didn't see it, but it's a game of inches," he explained.
"We thought Maa's try was a try and they called a knock on, felt it rolled and he didn't have enough contact down."