Scotland boss Andy Robinson faces an anxious wait over the fitness of Ruaridh Jackson after the fly-half was forced to leave the field after just 12 minutes into Glasgow's RaboDirect PRO12 clash with the Scarlets on Saturday.
Jackson, who was named in Robinson's 36-man squad for the upcoming Six Nations, pulled up after kicking a penalty to make it 8-3 to the Warriors at Parc Y Scarlets - a match the visitors eventually lost 16-14.
The Warriors will assess his fitness in the coming days but Robinson will hope he can call on him for their opening clash of the tournament against reigning champions England on February 4.
In a further blow to both club and country, prop Moray Low picked up a knee injury in the same game and he too could be a doubt for his country's Six Nations campaign.