Ramy Bensebaini provided the assist for Borussia Monchengladbach's final goal in 4-1 victory over Union Berlin, who had Antony Ujah come on in the final 10 minutes of the clash.
Marco Rose's men came into this tie on the back of a disappointing goalless draw at struggling Werder Bremen in mid-week while Die Eisernen were held at home by Mainz.
The hosts raced to a 2-0 first-half lead courtesy of goals from Florian Neuhaus and Marcus Thuram.
Sebastian Andersson pulled one back for the visitors five minutes into the second half.