Republic of Ireland midfielder Jamie McGrath has been ruled out for "two to three months" with shoulder damage.
McGrath, whose last Irish appearance came in October's 2-1 UEFA Nations League win in Finland, was a key player in Aberdeen’s strong start to the Scottish Premiership season before their form nose-dived.
Dons’ manager Jimmy Thelin confirmed that the player was facing a long lay-off after injuring himself after coming on as a substitute in the recent home draw with Hearts.
"Yes, it is, of course (a blow)," said Thelin of the loss of McGrath. "He’s really good at helping us to create chances and he’s a multifunctional player, he can play in different positions, he’s always giving everything.
"Sometimes you have some consistent pattern injuries, but now we have these shoulder injuries, it’s really bad luck.
"Actually, we tried to save Jamie because of his legs (by starting him on the bench against Hearts) and then he fell and broke his shoulder instead in that game.
"You always want every player available, but it’s also for the individual player himself.
"He’ll be out of the team for two or three months."
Fellow Irish player Gavin Molloy is also on the long-term absentee list with a shoulder injury.
"We have to be there to support them. But they are positive guys and they’re doing the best they can do," Thelin added.
Additional reporting: PA
