Flanker Alasdair Strokosch could miss the rest of Scotland's RBS 6 Nations campaign with a fractured hand, the Scottish Rugby Union have announced.
Gloucester forward Strokosch suffered the injury in Scotland's 27-13 loss to Wales at the Millennium Stadium on Sunday and was examined by his club's medical team on Monday.
Scotland team doctor James Robson said in a statement issued by the SRU: "Recovery from such an injury takes typically between four to six weeks."
The RBS 6 Nations is due to conclude on March 17, when Scotland are away to Italy.
Scotland were still waiting for news over wing Max Evans, who was forced off with an ankle injury and left Cardiff on crutches and wearing an immobilising boot.
Robson added: "Max will be seen by the specialist ankle surgeon John McKinley at Spire Murrayfield Hospital today and we will await a further update later this week."
Strokosch won his 25th cap in the match with Wales and was replaced by John Barclay, who could now team up with Ross Rennie and David Denton in the back row for the next match in the tournament, the February 26 clash with France.
Denton (foot) and prop Ed Kalman (neck) also required medical attention after the loss and will be monitored this week before the Scotland squad reconvene next week to prepare for Les Bleus.