Arsenal have confirmed captain Martin Odegaard faces a spell on the sidelines after limping off with an injury against West Ham.
Odegaard was forced off in the 30th minute of Arsenal's 2-0 win over West Ham at the Emirates on Saturday.
The Norwegian sustained the injury in what manager Mikel Arteta described as a 'knee on knee' collision with Crysencio Summerville.
Arsenal have confirmed the 26-year-old has been forced to withdraw from international duty with Norway.
The Premier League leaders confirmed Odegaard sustained a medial collateral ligament injury to his left knee.