The Sale Sharks have alleged that hooker Rob Webber was bitten by a Newcastle Falcons player in their 22-17 defeat at St James' Park on Saturday.
Steve Diamond criticised officials describing the lack of punishment as “madness” with the incident appearing to involve Newcastle lock Calum Green.
Diamond said that Webber showed referee Craig Maxwell-Keys the bite mark but the official insisted there was insufficient evidence to take action.
“Rob Webber’s got a bite mark that needed treatment at half-time and he may need to go to hospital with it,” said Diamond. “There was clear evidence of a bite mark.
“I get the reputation for being old school but Rob’s gone to the referee and shown him the bite where it’s bleeding and the referee has said there’s no clear evidence. But what more evidence do you need? Do I live on a different planet to those officials? No clear evidence? Madness.
“So we’ll see, the disciplinarians will take their view on it. I don’t know who it is – I’m sixty yards and the ref was two yards away so if he can’t see it, I can’t see it.”
Dean Richards confirmed that he was aware of the incident but said he did not know the identity of the culprit. “We’re aware that the allegation has been made and we’ll look very closely at it and deal with it accordingly,” Richards said.