Arsenal injury CRISIS deepens as Monreal and Debuchy both miss Dortmund tripARSENE WENGER is facing a defensive crisis at Arsenal. By James Dickenson 15:39, Mon, Sep 15, 2014 Link copied Bookmark Nacho Monreal has missed Arsenal's trip to Borussia Dortmund [ACTION]Mathieu Debuchy sustained ankle ligament damage during the 2-2 draw with Manchester City on Saturday and could be out for two months.And Wenger's options have dwindled further with Nacho Monreal not travelling with the squad to Germany.Arsenal take on Borussia Dortmund tomorrow night (7:45pm) but have just four fit senior defenders.Mathieu Debuchy could be out for two months [GETTY]Calum Chambers missed training this morning but is expected to start at right-back against the Bundesliga outfit.Per Mertesacker, Laurent Koscielny and Kieran Gibbs are available to make up the back-line, but any further injuries would see rookies drafted in.Hector Bellerin will be in Arsenal's squad while Mathieu Flamini could also cover in defence. Related articles Has Arsene Wenger leaked his TACTICS ahead of Champions League clash? We need Vieira or Petit! Arsene Wenger admits he wanted 'prodigious' midfielder at Arsenal Arsenal's Mathieu Debuchy set to miss TWO months of action after devastating ankle injury SUBSCRIBE Invalid emailWe use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy