Arsenal will be without Jack Wilshere for Wednesday night's Champions League meeting with Borussia Dortmund.
The England midfielder has been struggling with an ankle injury which last allowed him to play just over 20 minutes in the 2-0 win at Crystal Palace on October 26 and did not travel with the squad to Germany.
Gunners boss Arsene Wenger also said Wilshere was in danger of missing the weekend's Premier League trip to Manchester United as well as England's upcoming friendlies with Chile and Germany.
"Jack Wilshere has not travelled. He has another test on Thursday. If he does not pass that he is out for Sunday and for England," said Wenger.
