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.
Augsburg picked up their first win of the season by beating Eintracht Frankfurt 1-0.
Borussia Dortmund earned a 3-2 win at Augsburg on Friday night, although they nearly let the points slip in Bavaria.
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