A goal seven minutes into stoppage-time earned 10-man Hertha Berlin a 2-2 draw from their trip to Freiburg.
Shinjji Okazaki scored twice in Mainz's 3-1 victory away to Hertha Berlin on Saturday afternoon.
Hertha Berlin have signed former Chelsea forward Salomon Kalou on a three-year contract.
Bayern Munich were held to a 1-1 draw by Schalke, while Bayer Leverkusen ran out 4-2 winners against Hertha Berlin.
Bayer Leverkusen twice came from behind to beat Hertha Berlin 4-2 at the BayArena and maintain their perfect start.
Sky Sports understands Hertha Berlin are leading the chase to sign Lille forward Salomon Kalou.
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