A shoulder injury has ruled versatile back Matt Faddes out of the Ulster team for the remainder of the season.
The absence of the New Zealander, who scored a try in Saturday's Pro14 defeat by Ospreys, is a major blow for the Irish province.
Ulster said on Monday that the 28-year-old will require surgery on the injury.
Meanwhile, prop Kyle McCall is "currently unavailable for selection" with a foot injury but centre James Hume returns after a hamstring problem.
Faddes joined Ulster from the Highlanders and Otago in May 2019.
His try in Swansea was not enough to prevent Ulster going down to a surprise loss to the bottom team in Conference A.
The result sees Dan McFarland's remain second in Conference A as they prepare to take on the third-placed Cheetahs at Kingspan Stadium on Saturday.