Richard Cockerill has described the decision by the Heineken Cup organisers not to cite Toulon lock Bakkies Botha for seriously injuring Leicester Tigers prop Marcos Ayerza as "disgraceful".
Leicester's director of rugby slammed European Rugby Cup (ERC) after the second-half incident at the Stade Felix Mayol on Sunday, which left Ayerza with a broken collar bone.
Cockerill accused ERC's disciplinary officer of "not being in touch with the modern game".
"Marcos has broken his collarbone in two," said Cockerill. "He will have surgery today to have it plated and repaired, and he will be out for three months.
"I have been told that there will be no citing of the incident.
"The citing officer put it forward as a citable offence but the gatekeeper from ERC's disciplinary section has decided that it is not worthy of a citing.
"From the footage we have seen, we felt that it was an illegal act (by Botha) of jumping into a tackle.
"It caused a lot of damage to the player and I am very disappointed in the attitude that ERC have come back to us with.
"And I am bitterly disappointed with the inconsistency at disciplinary level within ERC yet again.
"They have failed to deal with what, in my opinion, is an act of foul play.
"I am pretty sure it is against the laws of the game to hurdle into a player – and that has caused damage to our player who will now miss the rest of the season.
"For me, that is a disgraceful decision to not, at least, have a hearing to look at all of the facts.
"To lose one of the best loosehead props in the world in that fashion is disappointing.
"It leaves a sour taste in the mouth. The rule-makers are so fussy on so many things but, when something like this happens, the disciplinary panels and officers decide there is no case to answer."
Samoan Logovi'i Mulipola will be favourite to fill Ayerza's No.1 shirt against Wasps on Sunday.
Cockerill also hinted that a couple of changes could be made in the squad.
Flanker Steve Mafi is back in full training this week, while Leicester were "hopeful" that Tom Croft could also prove his fitness after a back spasm in Toulon.