Aberdeen midfielder Fraser Fyvie could be out for up to six weeks after tests revealed he suffered ankle ligament damage in Saturday's game at Hibernian.
The 16-year-old was stretchered off following a challenge by Ian Murray in the 2-0 defeat at Easter Road.
Dons manager Mark McGhee said: "We are all disappointed for him at this early stage in his career. But it's an injury that will fix itself. He'll be back."
The teenager has made seven first-team appearances for the club this season.
Fyvie was injured shortly before Liam Miller and Colin Nish scored two late goals to deny nine-man Aberdeen a point following red cards for Maurice Ross and Chris Maguire.
McGhee added: "Fraser has been important in the way we have played, in the last three games in particular."
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