Cologne left it late to grab a point at home to Bayer Leverkusen in a 1-1 Rhineland derby draw.
Hertha Berlin and Cologne took a point each from their clash, with the goalless draw seemingly satisfying both sides.
Stuttgart boosted their survival hopes with a 3-2 home win over Werder Bremen, while Cologne saw off Hoffenheim by the same scoreline.
Cologne made what could prove to be a decisive step away from the relegation zone with a 3-2 win over Hoffenheim.
Freiburg beat Cologne 1-0 on Saturday to open clear water between themselves and the relegation zone.
Robert Lewandowski was the difference in the German Klassiker, while there were wins for Monchengladbach and Leverkusen
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