Mertesacker confident of victory over Dortmund

Defender Per Mertesacker feels Arsenal must stay relaxed when they look to ride their new-found confidence and secure a positive result against Borussia Dortmund at the Westfalenstadion on Wednesday.

The Gunners head to Germany on the back of a 2-0 win over Liverpool which kept them at the top of the Barclays Premier League and produced the required response following a disappointing home exit from the Capital One Cup against Chelsea.