Rangers are waiting to learn the extent of Minsu Kim's injury after the winger pulled out of South Korea U21 duty.
The 20-year-old has been a key player for Derek McInnes since his arrival from Girona in the summer. After earning an emotional first senior call-up and cap in the last break, he dropped into the U21 squad for the upcoming window.
Olympic eligibility factor
It's understood that his eligibility for his country's Olympic Games squad in 2028, by which point he will only be 23, was a factor in that demotion.
But he now won't be involved for his nation at any level during this break as he's withdrawn due to injury.
A South Korean FA statement reads: "Kim Min-su has been excluded from the call-up for player protection due to injury. Kim Gyeol (Suwon Samsung) will be called up as his replacement."
Key player for Rangers
Kim has started all but one of Rangers' league games since his arrival. Despite being yet to register a goal or an assist, he's highly rated by boss McInnes, who will be concerned if his injury is a lasting one.
