Arsenal midfielder Jack Wilshere has sat out training ahead of the team's trip to Borussia Dortmund in the Champions League on Wednesday.
The 21-year-old missed the Gunners' 2-0 win over Liverpool in the Premier League on Saturday due to an ankle problem.
Wilshere could now be forced to sit out the match at the Westfalenstadion as Arsenal hope to edge closer to the next round of the competition.
The North London club are currently above Dortmund and Napoli on goal difference at the top of Group F.
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