Aberdeen manager Craig Brown says Niall McGinn’s injury is ‘a huge blow’ for the player and the club so early in the season.
The 25-year-old forward was carried from the field on a stretcher after falling awkwardly against Ross County.
Tests have shown the Northern Irishman has damaged ankle ligaments and could be out of action for over a month leaving Dons boss Brown worried.
He told national newspapers: “It’s a blow just as our season is getting underway.
“It’s also a huge blow for him at a time when he was settling in at the club and this will set him back a few more weeks.
“It looks like it’s damaged ligaments but we need to wait to hear from the medical team.”
McGinn was left out of Northern Ireland’s intial 23-man squad for their friendly with Finland before being added to the party.
Brown says missing out on the game is an added blow for the former Celtic player, adding: “We have no issue with the County player as it was a fair challenge and the injury was caused when Niall landed awkwardly. It has also cost him a cap which is a real shame.”