Scotland wing Tim Visser will be sidelined for up to four months after breaking his shin and damaging ankle ligaments in a club game.
Exams showed Visser will need surgery, his Edinburgh club said on Tuesday.
Visser, Edinburgh’s leading try-scorer, was hurt in a Pro12 win over Treviso at Murrayfield on Friday.
He will miss Scotland’s autumn tests next month against Japan, South Africa and Australia, and could miss the start of the Six Nations on February 2.
He has six tries in 12 Tests for Scotland, since his debut last year.
“He’s an asset for Edinburgh Rugby and Scotland,” Edinburgh coach Alan Solomons said.
“We all wish him a speedy recovery.”