Arsenal manager Mikel Arteta has revealed defender Kieran Tierney's has suffered a knee injury and "doesn't look good".
And a report has claimed his season could be over after sustaining the problem on international duty.
The former Celtic left-back is a fan favourite at the Gunners but was left out of the squad for the trip across London to Crystal Palace on Monday night.
And the Scottish Sun claim he's played his final game this term - including the potential June World Cup play-off against Ukraine.
Tierney, who scored for Scotland in the recent friendly against Poland, is set to see a specialist on Tuesday about the injury.
Arteta told Sky Sports: "He came back from international duty and felt something wrong in his knee.
"There is some damage there.
"We will hopefully know more on Tuesday but it isn't looking good."
