Scotland fly-half Duncan Weir will miss the whole of the Six Nations after suffering a bicep injury.
The Glasgow playmaker requires surgery on his bicep and the recovery time for the operation seems set to keep him out until at least the end of the Championship.
Finn Russell will likely continue in the fly-half jersey, but Vern Cotter will need to find a back-up, with Weir having filled that role during the November Tests.
Weir played in all three Tests in November, but while Glasgow boss Gregor Townsend did not give an exact timeframe for his return, he admits it will be a case of months rather than weeks.
“I would like to think it won’t be the end of his season, but I think it rules out the Six Nations,” said Townsend.
“With a bicep injury you are talking months rather than weeks.”