Newly-promoted pair Paderborn and Cologne extended their unbeaten starts to the campaign with a goalless draw on Saturday.
Cologne picked up their first win of the season at Stuttgart whose fans made their dissatisfaction clear to coach Armin Veh.
Bayer Leverkusen claimed a shock 2-0 Bundesliga win at Borussia Dortmund on Saturday, while Hannover beat Schalke.
A crowd of 50,000 watched Cologne play out a goalless draw with Hamburg on their return to the top flight.
Stuttgart followed Mainz out of the DFB-Pokal in the first round, succumbing 2-0 to Bochum, while Marco Reus returned in a victory for Borussia Dortmund.
Bundesliga champions Bayern Munich will launch the defence of their title against Wolfsburg in the 2014/15 season.