Dortmund beat Bayern Munich 1-0 away from home thanks to Mario Goetze, ironically an Arsenal target. The pair meet in London in the Champions League this week.
“Practically nothing tops beating good teams,” he said. “We managed that [against Bayern] and we can do that again on Wednesday. It will be a different challenge, but today was an important sign that we can also do this at Arsenal. It was a perfect day for us.”
