Wales lock Ian Evans will discover if he will miss the Six Nations when he faces a European Rugby Cup disciplinary hearing on Thursday.
The Ospreys second-row was sent off by referee Romain Poite for allegedly stamping on Leinster counterpart Mike McCarthy during last Friday's Heineken Cup clash.
The incident left Ireland international McCarthy with blood streaming down his face and Poite made the decision to dismiss Evans, who has won 32 caps for his country, after viewing television replays.
The range of suspensions for a stamping offence begin at two weeks, with the upper-end punishment being anything between nine and 52 weeks.
Jeremy Summers of England has been appointed as the independent Judicial Officer for the hearing in Dublin.
Following Friday's game, Ospreys backs coach Gruff Rees had said: "It was a big moment, but I'm not sure about it to be honest, like a lot of observers, I think.
"Perhaps it was a bit reckless, but there were a lot of replays needed to make a decision, which suggests it wasn't that clear and obvious.
"It took five or six times in slow-mo to isolate the incident. I don't know if that's clear and obvious from a red card point of view, and it changes the game.
"You have to be absolutely certain with a red card, and that there were so many replays and there are still so many differing opinions on it suggests that the clips may not have been totally conclusive.
"I think when it does get slowed down to the nth degree, something worse can be made of it."