Ulster are set to play without Michael Lowry, Aitzol Arenzana-King and Robert Baloucoune in their United Rugby Championship match against Glasgow at Scotstoun this Saturday.
The three players were unavailable due to injuries sustained during the province's opening fixture of the 2026-27 campaign against Edinburgh.
Full-back Lowry suffered a concussion while captaining the side, which secured two bonus points after bouncing back from a 34-5 deficit.
Wing Arenzana-King picked up a knee injury during the game in Belfast, where Richie Murphy's side ultimately fell short despite scoring four tries.
Baloucoune also suffered a concussion in the Irish province's 34-29 defeat by Edinburgh in their first URC game of the season.
All three players were part of the starting line-up for last weekend's fixture, with Lowry leading the team and Arenzana-King contributing as a winger.
The Glasgow match is scheduled to kick off at 17:30 BST.
Ulster will need to rely on their remaining squad members to cover the positions vacated by the injured backs.