Leonardo Bittencourt scored as Koln lost 2-1 to Hertha Berlin on Saturday.
Koln remain perched on the edge of relegation to the second tier of German football after Saturday's 2-1 defeat away at Hertha Berlin.
Stefan Ruthenbeck's side remain six points adrift of even the promotion/relegation play-off spot in the Bundesliga table, having endured another difficult day.
Leonardo Bittencourt had given Koln the lead at the Olympiastadion, but two goals from Davie Selke turned the game on its head and handed Hertha all three points.
Koln are another step closer to relegation, and that means that goalscorer Bittencourt may be another step closer to finding a way out of the club this summer.
With Mauricio Pochettino reportedly keen, Tottenham may well be monitoring Koln's results, if only just to see how close they are to being able to land the playmaker in a bargain deal.
The former Borussia Dortmund talent, 24, has notched two goals and two assists in his last seven games, as he attempts to boost Koln's chances of survival – but the reality is that the midfielder is likely to be playing his football away from Koln next season.