Ulster’s Dan Tuohy, who has been ruled out for at least two months with ankle ligament damage, will find out on Tuesday if he requires surgery.
Tuohy suffered the injury during Friday's 14-7 win over Edinburgh at Kingspan Stadium and will be reviewed by a surgeon tomorrow.
Peter Nelson, also injured against Edinburgh, is out for the season after dislocating his left midfoot. It was put back in place by Ulster’s medical staff at the time and he will undergo surgery when the swelling subsides.
Ian Henderson, who suffered a hamstring tear in the same match will know more about his absence after consulting a surgeon, while Darren Cave suffered a shoulder injury and is out for a minimum of two games.
Roger Wilson had a back spasm before the game and was removed from the squad as a precaution but is expected to be available for selection for the match against Toulouse this Friday.