The German record champions constricted Uwe Neuhaus's team from the start and took the lead with the first big chance in the eighth minute, when Müller first got stuck on an opponent after Lewandowski's heel pass but then completed the scoring . The underdog could hardly breathe and was already behind with two goals in the 25th minute when Lewandowski got too much space from the edge of the box after preliminary work by Goretzka and hit the left corner dry.
In the 31st minute, the hosts also spoke up offensively when Klos failed after a long blow from Ortega free in front of Neuer at the German national goalkeeper. Doan tried it from a distance in the 33rd minute, but the Bayern goalkeeper was there too. On the other side, Ortega was able to excel after a shot from a distance from Tolisso. The final point of a one-sided first half was set by Lewandowski, whose attempt was deflected in stoppage time and jumped past the Arminia goalkeeper into the goal.
After the break, the reigning Champions League winner did not give up and increased in the 51st minute by Müller after Lewandowski flank, who nailed the leather to the lower edge of the crossbar, from where it bounced behind the line. But the Arminia showed morale and Doan hit after a counterattack from the right edge of the box into the far corner. In the 76th, the guests got outnumbered when Tolisso was the last man after a bad back pass from Martinez straddled the approaching toilet and saw red. Hansi Flick's team managed the result with confidence and with the victory are now in second place behind Leipzig in the table, Bielefeld slipped to 13th place.