Martin Odegaard was taken off at half-time of Norway's World Cup qualifier against Gibraltar on Wednesday after seemingly suffering an ankle injury.
The Arsenal midfielder appeared to turn his ankle in the first half and after receiving treatment on the pitch, he was withdrawn at half-time in an eventual 3-0 win for Norway.
Odegaard has been in good form for Arsenal since joining on loan from Real Madrid in January, and his absence would be a blow to the Gunners.