Scotland could be without flyhalf Adam Hastings for next month’s Six Nations after his club Gloucester said he will require shoulder surgery, adding to coach Gregor Townsend’s injury problems in the build-up to the tournament. Hastings, who has 27 caps, damaged his shoulder in their 28-13 Premiership defeat to Leicester Tigers on Dec. 24, his first outing since he sustained an injury while playing for Scotland against Fiji in November.