Bayern Munich were held to a 1-1 draw by Schalke, while Bayer Leverkusen ran out 4-2 winners against Hertha Berlin.
Wolfsburg are still waiting for their first win as substitute Vaclav Kadlec earned Eintracht Frankfurt a 2-2 draw.
Bayer Leverkusen claimed a shock 2-0 Bundesliga win at Borussia Dortmund on Saturday, while Hannover beat Schalke.
Haris Seferovic's goal was enough for Eintracht Frankfurt to make a winning start to the season, beating Freiburg 1-0 at the Waldstadion.
Eintracht Frankfurt have secured the services of forward Haris Seferovic following negotiations with Real Sociedad.
Eintracht Frankfurt have completed the signing of striker Nelson Valdez, the club have announced.
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