Arsenal boss Arsene Wenger is seeking tips on beating Champions League opponents Borussia Dortmund from new German signing Per Mertesacker.

Germany centre-back Mertesacker, a £9m arrival from Werder Bremen, made a solid start against Swansea..

And Wenger said: "He knows the Dortmund stadium well and knows German football. He talks and communicates with the team and when a German communicates, you listen!"

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