Ulster Rugby have injury concerns surrounding Tom Stewart (hamstring), Andrew Warwick (ankle) and Eric O'Sullivan (knee) arising out of Friday's fixture against Queensland Reds.
All three players will have scans this week to further ascertain the extent of their respective injuries.
James Hume, Jacob Stockdale and Stuart McCloskey, all of whom returned to action following recent injury, came through the game well and are available for selection.
Prop, Tom O’Toole, is also available for selection following his suspension.