Scotland are set to be without Stuart Hogg for their November internationals after the talismanic full-back underwent ankle surgery.
Hogg was hurt in Glasgow Warriors' victory over Munster earlier this month, with his injury proving more severe than first feared.
The British and Irish Lions star had an operation on Thursday and is now facing 10 to 12 weeks on the sidelines, meaning he appears certain to miss Scotland's Tests against Wales, Fiji, South Africa and Argentina.
"I'm gutted to be missing some important games for Glasgow Warriors and Scotland over the next few months," said Hogg.
"My focus just now is working hard and getting fit, so I can play my part in what is a long season."
Glasgow coach Dave Rennie added: "Hoggy injured his ankle in the game against Munster and then flew to South Africa with the squad for our Pro14 matches against the Cheetahs and the Kings.
"He didn't train over here as it often takes a few days for the swelling to go down and he returned home when we realised it was more serious than we thought.
"It's frustrating for him. He got himself in extremely good nick for the start of the season and was arguably one of the best players on the park in the opening two games. But it's a long old season, he's a resilient man and we're looking forward to seeing him back out there soon.
