Nacho Monreal has added to Arsenal's injury crisis ahead of their key Champions League clash against Borussia Dortmund this week after he was forced to pull out through injury.
The Gunners will be without Mathieu Debuchy until Christmas after he was stretchered off with an ankle injury against Manchester City on Saturday.
Arsenal boss Arsene Wenger is yet to confirm the extent of the Frenchman's injury but it looks as though he will be without his first-choice right-back for some time. It now looks as though he will be without Monreal too after he was forced to pull out of the squad that's travelling to Dortmund for their key clash on Tuesday.
The Telegraph claim that his injury is not serious but it is enough to ensure he misses tomorrow game, which further adds to Wenger's worries at the back. Along with Debuchy and Monreal, Calum Chambers was forced to miss training this morning - although he should be fit to play.
The injury news means that as things stand, Arsenal only have four senior defenders to call upon; Per Mertesacker, Laurent Koscielny, Keiran Gibbs and Chambers. Gibbs was forced to sit out of Arsenal's draw with Manchester City on Saturday as he recovers from injury, although he should be fit to feature. Hector Bellerin is also in the squad.
Given the lack of options at Wenger's disposal, the French boss may be rueing not buying a central defender over the summer. Thomas Vermaelen was allowed to join Barcelona but no direct replacement was signed, although Chambers can operate through the middle.
Although Dortmund will be buoyed by news of Arsenal's injury crisis they have their own troubles at the back too; captain Mats Hummels has confirmed that he won't have recovered form injury in time to feature on Tuesday.
Arsenal have become accustomed to taking on Borussia Dortmund in the Champions League in recent seasons. They've have met in the group stages twice in the last four years and Arsenal hold the slight advantage having won twice in their four meetings. Dortmund claimed a win in north London last year, while they played out a 1-1 draw in 2011.