Bayer Leverkusen run of poor form continue this weekend as they suffered a disappointing home defeat against Koln.
Keen on redeeming their recent Champions League defeat, Leverkusen tried to take control of proceeding.
However, it was Koln that got themselves the lead when Dominic Maroh scored after 17 minutes of play.
The home side were not keen on going down easily though as they poured forward and did get back on level terms through Javier Hernandez's goal on 33 minutes.
After the break, those two teams continuing their attacking display, but it was Koln that eventually came away with all three points when Maroh completed his brace on 72 minutes.