Union welcomed Dortmund to the capital on matchday 22 of the Bundesliga season last Sunday. The visitors breezed to 0-3 win to close the gap on Bayern who were shocked at Bochum, losing 4-2.
A first half brace from Marco Reus had Dortmund firm favourites going into the break. The game was then wrapped up on 71 minutes as Guerreiro got Borussia's third.
Despite Bayern's upset at Bochum, they are still 6 points ahead of Dormund in the table. Union dropped to 7th place but they remain in contention for Europe as they match Leipzig in 4th on 31 points.
Watch the highlights from the match above!