St Mirren defender Marc McAusland has suffered a fractured eye socket and faces several weeks on the sidelines.
The Buddies have revealed that the 23-year-old centre-half picked up the injury during Saturday's 1-1 draw with Aberdeen before being taken off at half-time at St Mirren Park.
Manager Danny Lennon told his club website: "Marc has a fracture in his eye socket.
"He will see a specialist on Wednesday to see how we move forward."
McAusland has established himself as a first-team regular this season following the cruciate ligament injury suffered by Darren McGregor.
"Until Marc sees the specialist, we have no idea of the timescale involved for him to get back to full fitness," added Lennon.
The Buddies were already resigned to being without left-back Jeroen Tesselaar for up to six weeks and Lennon revealed that the Dutchman was to undergo knee surgery within hours of his website statement.