Bayer 04 Leverkusen suffered a dramatic defeat at the hands of Borussia Dortmund, who secured a crucial 2-1 victory in the Bundesliga. Emre Kalkan's consolation goal couldn't salvage the hosts, as Julian Brandt's opener and Marco Reus' late strike proved decisive for the visitors. The win lifts Dortmund to second place, while Leverkusen remains four points adrift with several teams closing in.