Arsenal fear that Kieran Tierney's season could be over after the left back missed Monday night's defeat to Crystal Palace with a knee injury.
The Scotland international will see a specialist on Tuesday to determine the severity of the injury, as concerns grow that the 24-year-old could be out for a long period.
Gunners boss Mikel Arteta was forced to play Nuno Tavares in the absence of Tierney, with the Portuguese being hauled off on 45 minutes after a below-par performance.
