Wenger disappointed by Gunners

Arsenal boss Arsene Wenger says his side did not perform at the required level after losing their opening Champions League match 2-0 against Borussia Dortmund.

Goals from Ciro Immobile and Pierre-Emerick Aubameyang either side of half-time ensured Arsenal's campaign got off to a poor start in Germany.

Wenger feels his side created some good chances to score and says he could not understand how, in particular, they conceded the first goal.

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