Melbourne coach Paul Roos.

Melbourne coach Paul Roos. Photo: Getty Images

Melbourne is set to defend Jack Viney "rigorously" in what is looming as a landmark tribunal case for the AFL's evolving stance on the bump.

Demons coach Paul Roos confirmed Viney would plead not guilty when he faces the tribunal on Tuesday night for his part in a collision that resulted in Adelaide forward Tom Lynch suffering a broken jaw, and his teammate Alex Georgiou suffering concussion.

The match review panel on Monday decided not to rule on Viney's rough conduct charge, setting up a hearing that experienced people like Essendon coach Mark Thompson and former Hawthorn great Dermott Brereton believe will be crucial in shaping the parameters for the bump.

On Fox Footy on Monday night, Roos said the club would fully support Viney, believing the young midfielder had no alternative except to "brace himself for contact".

"Given it's a tribunal matter, I don't think I can say anything, but we'll defend it vigorously - no question about it," he said.

"We've had a really good look at it. We believe Jack is actually bracing himself for contact because there's two guys coming the other way."

In an incident set to polarise opinion, North Melbourne legend Wayne Carey said on Channel Seven that he believed Viney would receive a four-week suspension, based on previous incidents and the fact that Lynch suffered a significant injury that would sideline him for as many as six weeks.

Thompson echoed the opinion of several former players, including Brereton, by expressing concern about any decision based purely on the outcome, rather than the action.

"It would be (a) landmark moment in footy because from that point forward, if someone gets hurt, are they always responsible?" the Bombers coach pondered on Fox Footy.

"People are going to get injured, they always have.

"It didn't look bad, if he had not... broken his jaw... he got low, he turned, there's no elbow, there's nothing malicious in it at all."

Of the incident, Brereton said on SEN: "If we do [find him guilty], what we're now saying is we don't want any injuries, regardless of the scenario".

Former Demons great Garry Lyon said he would "hate" to see Viney suspended for the incident in which extenuating circumstances were clearly in play.