Ulster have been hit by several injury concerns with Dan Tuohy, Iain Henderson, Peter Nelson and Darren Cave all facing spells out of the game.
Tuohy fractured his right ankle and suffered ligament damage. He will be reviewed by a surgeon on Tuesday to ascertain whether surgery is required. The injury will rule the second-row out for at least two months.
But the bad news didn't stop there as full-back Nelson dislocated his left midfoot in a season-ending injury. It was relocated in the medical room at Kingspan Stadium and he was admitted into the Ulster Independent Clinic overnight on Friday. He is now at home and will have scheduled surgery when the swelling subsides.
Ulster continued in a statement: "Iain (Henderson) suffered a significant hamstring tear (left leg). He will be reviewed by a surgeon and his ongoing management and prognosis will be clearer after this consultation has taken place.
"Darren (Cave) suffered an AC joint (right shoulder) injury. His recovery will be managed on an ongoing basis but he will be ruled out for a minimum of two games."
And in a final, less serious concern for the squad, number eight Wilson had a back spasm on Friday and was withdrawn from the matchday squad against Edinburgh as a result. The injury has settled well and he is expected to be available for selection for the match against Toulouse this Friday.