The meeting, held in Berlin, ended with a score of 2: 1 in favor of the home team.
The victory for "Union" brought goals from Taiwo Avonii, who distinguished himself in the 57th minute, and Marvin Friedrich, who scored in the 78th minute.
Borussia responded with a goal from Yussuf Mukoko, who became the youngest scorer in Bundesliga history - 16 years and 29 days.
Borussia with 22 points occupies the fourth place in the standings.
"Union" with 21 points - the fifth.
Earlier it was reported that Lewandowski's double helped Bayern win a strong-willed victory over Wolfsburg in the Bundesliga.