German defender Per Mertesacker believes Arsenal must stay calm, ahead of their highly anticipated trip to Borussia Dortmund, as they look to remain top of Group F.
The Gunners head to the Westfalenstadion following their 2-1 defeat by the Germans two weeks ago. However current form is promising, after overcoming Liverpool comfortably at the weekend.
But the North London club aren't so comfy in Europe at present, and with Dortmund's current home form sitting peachy at 100 per cent, Arsene Wenger's task looks tougher than first perceived.
Despite the odds, Mertesacker feels if Arsenal play their own game then there is no reason why they can't take home a positive result.
The defender told the Belfast Telegraph: "It is difficult to play Dortmund, especially away from home, but we have to keep our confidence.
"We are on a high level. We are top of the (Premier) League.
"We try to gain confidence and we need to get a good result over there.
"But we are relaxed. We did show already in the Premier League that we are one of the best teams."
Should Arsenal inflict defeat on last year's runners up of the competition, it will be the first time they have lost at home since May this year.
Jurgen Klopp's side warmed up for the match with an emphatic 6-1 victory of Stuttgart, in which Premier League target Robert Lewandowski bagged a hat-trick.
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