Cologne struck twice in three minutes to edge past Hertha Berlin 3-1 on Sunday for their third straight league win.
Second-placed Borussia Dortmund slumped to a year-ending 3-2 defeat at Hertha Berlin on Saturday.
Bayer Leverkusen's Robert Andrich tapped in a last minute equaliser for a 1-1 draw at Hertha Berlin on Sunday to rescue a point.
Hoffenheim scored twice with Andrej Kramaric and Sebastian Rudy in the first half to beat 10-man Hertha Berlin 2-0 on Friday.
Investment guru Windhorst came to Hertha Berlin with big talk and even bigger dreams, but things haven't gone according to plan. Far from it.
Hertha Berlin's new signing Jurgen Ekkelenkamp scored once and had a hand in their second goal in 2-1 victory over Greuther Fuerth.
Hertha Berlin's Suat Serdar scored a brilliant first-half double as they climbed off the bottom of the Bundesliga and out of the relegation zone.
Bayern Munich's Robert Lewandowski continued his imperious form with a superb hat-trick as they cruised past Hertha Berlin with a 5-0 win.
Atletico Madrid have signed Brazil forward Matheus Cunha from Hertha Berlin, the club have announced.
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