Scotland flanker Alasdair Strokosch could still play some part in the RBS 6 Nations despite confirmation he suffered a fractured bone near his eye during the opening defeat against England.
Strokosch will be out for four weeks, meaning he will definitely miss the visit of Ireland on February 24 after already being ruled out of Saturday's clash against Italy.
Scotland team doctor James Robson said: "Alasdair was seen by a specialist at the Spire Murrayfield Hospital this week and the injury was diagnosed as a fracture of the orbital floor (the area around the eye).
"Alasdair is returning to his club in France and will be in their care.
"If he has no complications he should be available to return to action in four weeks' time."
The hooker has a mild knee strain and his provisional place among the replacements will be taken by his Glasgow team-mate Pat MacArthur.
MacArthur, 25, said: "It's a huge honour to have the chance to play for my country.
"It's something I've dreamed about since I started playing mini rugby at Ayr and aimed for since I became a professional with Glasgow Warriors."