Augsburg got back to winning ways by beating Hertha Berlin 1-0, to make it an unhappy SGL Arena return for Jos Luhukay.
Son Heung-Min helped get Bayer Leverkusen back to winning ways with the only goal of the game against Augsburg.
Bayern Munich dropped Bundesliga points for only the second time this season, as Borussia Dortmund were defeated.
Augsburg inflicted a first defeat of the season on Werder Bremen after recovering from an early deficit to win 4-2.
The DFB are to investigate how Eintracht Frankfurt were not given a penalty in their 1-0 defeat to Augsburg on Sunda
Hannover piled the pressure on their former coach Mirko Slomka with a 2-0 victory over his Hamburg.
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