Arsenal boss Arsene Wenger admits he has some defensive worries ahead of this week's Champions League clash with Borussia Dortmund.
The Gunners are likely to be without right-back Mathieu Debuchy for a while after he sustained an ankle injury in the weekend's 2-2 draw with Manchester City while left-back Nacho Monreal will not travel due to a back problem.
Youngster Calum Chambers is a doubt because of illness and Kieran Gibbs is still recovering from a hamstring injury meaning the Gunners will be left with just Laurent Koscielny, Per Mertesacker and 19-year old Hector Bellerin as their only fit defenders.
Wenger touched on the injuries to his players but was confident he would be able to field a quality back four as the Gunners get set to take on Dortmund at Westfalenstadion on Tuesday night.
"Monreal didn't travel and we have a little problem with Chambers but he should be alright," said Wenger.
"Monreal has a back problem, he should be available on Friday. We'll assess Chambers tomorrow morning. At the moment he's 50/50 with tonsillitis.
"Apart from that everyone is here, I don't think I forget anybody apart from Debuchy, who is out for a longer period. (Yaya) Sanogo stayed at home as well with a little hamstring problem.
"We don't know [how long Debuchy will be out for yet].
"In defence the Debuchy injury puts us a little bit in a situation where we do not want more. Hopefully we will have good news after he has a scan and that he will be back soon.
"We have Chambers who can play in different positions, Monreal can play centre-back and we also have Bellerin who I think is now ready to play."
