The Wasps player faces a lengthy spell on the sidelines.
England flanker Jack Willis will be given further specialist advice in the next fortnight to gauge the full extent of a knee injury that looks likely to end his season.
Wasps head coach Lee Blackett said: “He is going to see the specialist again in the next 10-14 days.
“We will know a lot more when he sees the specialist and it settles down. I can’t tell you exactly how long (he will be out), but it is a pretty significant injury.”
Willis’ leg buckled awkwardly when Sebastian Negri used the legal but contentious ‘crocodile roll’ technique to twist him out of the ruck.
Asked during a Wasps virtual press conference if Willis would be out for the season, Blackett added: “I think he is going to be out for a…