Northampton boss Jim Mallinder believes two late refereeing decisions cost his team in their dramatic defeat to Gloucester at Kingsholm on Saturday.
Gloucester centre Billy Twelvetrees succeeded with a penalty with the game's final kick to claim a dramatic 26-24 victory over the Saints.
But the performace of referee Martin Fox had a big impact after Northampton had taken a one-point lead with a minute left - firstly failing to penalise Gloucester after four of their players were offside from the restart.
Fox then pinned Saints at an ensuing reset scrum when it looked as though Northampton should have had a penalty for the Cherry and Whites' number eight Ben Morgan illegally kicking possession back into a scrum.
"It is a shame when games are decided by the referee in the last couple of minutes," said a fuming Mallinder.
"We were disappointed when we had the change of referee at short notice, but sometimes that happens. What we have got to make sure of is that we control what we can control. The refs are out of our hands.
"We've got to make sure that parts of our game we are more accurate with. You have got to try to put the referee out of the equation.
"My reading of the scrum at the end, particularly the second scrum, was that we had control of the ball, so the reset should have been our put-in. I don't want to say any more, really.
"I have taken my frustration out - I kicked whatever was at the side of the pitch. We came close, we will win some and we will lose some. Clearly, the penalty count didn't go in our favour."
Gloucester rugby director Nigel Davies had a different view of events, however, after his side registered their first Premiership win of the season after defeats to Sale and Saracens.
"Sometimes you get the rub of the green, sometimes you don't," he said.
"More importantly, from my perspective, I felt that overall we deserved to win with the performance we put in.
"What is important is that we got the win. It was a very exciting game with a very dramatic ending to a fabulous match. Sport is about momentum, and we didn't really have any before today.
"We were hugely disappointed with our performance against Sale, and against Saracens it was very difficult to judge us because we were playing with 14 men, but today was a huge stride forward.
"Billy will know he had a mixed bag today, but ultimately he came through strong. He had the confidence in himself to nail an absolutely crucial kick for us to get our season under way."