IN FRONT of more than 75,000 people against its arch-rival at the MCG, Carlton let its fans down, according to coach Michael Voss.

A 56-point loss to Collingwood came due to poor skill execution and decision making, and was exacerbated by six changes at the selection table during the week.

"We let our club down tonight," Voss said frankly.

"We want our supporters to be proud of us, and we didn't do that tonight. There's an expectation on the way we want to be able to play, and we didn't do that tonight. So, that's something that we're going to have to sit with. Not going to avoid that conversation, we'll have to cop our whack.

"We have to cop it because we can't tolerate that. That was a really poor performance."

After a strong start, whereby the Blues trailed by just one goal at the first break, Collingwood took hold of the game, winning contested footy and turning that into damaging attack. Across the second and third terms, the Pies outscored Carlton 78-24, putting paid to the game.

Voss took his leaders aside at three-quarter time to address the freefall, and ultimately won the final quarter by four points.

"It's more about standards. What standards do we accept, and what standards are we accepting from one another right now?" Voss said of the conversation.

"So, what feedback do we actually give to one another and how direct do we need to give it? Because there's a sense of urgency in that moment to be able to correct, and we weren't able to do that, so engaging the leaders was effectively that conversation."

Unfortunately, it was simply too little, too late for the Blues.

"We got the response, but it's too late… you still want to see actions that show that, you know, what are the winning behaviours that we want to continue to promote at this football club?" Voss said.