Germany coach Joachim Low cannot believe that Mesut Ozil has ended up as an Arsenal player.
The German midfielder switched from Real Madrid on transfer deadline day for over £40 million.
Low said it was "incomprehensible" that the Spaniards sold "one of their top scorers".
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However, he also said that Arsenal boss Arsene Wenger is a "top coach", and that they are a "strong team".