Arsenal boss Wenger hails Koscielny-Mertesacker partnership
Wenger hopes it is an understanding which can continue to return positive results from the challenges ahead.
"We have two clean sheets now in two big games and you never do that without a huge contribution of your centre-backs," Wenger said on Arsenal Player.
"It is a mixture of quality, being calm, confidence and not panicking in very heated situations.
"At the moment, they are at their peak in these kind of situations."
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