St Mirren defender David van Zanten is set to miss the rest of the season through injury.
Van Zanten has been forced to go under the knife after suffering a knee cartilage problem in training last week.
Buddies boss Gus MacPherson fears the operation will rule out the full-back for the remainder of the campaign.
Surgery"We are looking at him having surgery in the middle of next week," said MacPherson.
"After that we will have a better idea as to how long he will be out for.
"Because we are running out of games it could be the end of his season."