Köln came from behind to get the better of Hamburg 2-1 at the Mungersdorfer Stadion, thanks in no small part to a controversial second-half penalty decision.
Sven Schipplock stole in between some sleeping Köln defenders and pulled the ball back for Lewis Holtby, to place his shot low into the bottom left-hand corner and give Hamburg the lead in the second half. Philipp Hosiner then ghosted in between two defenders to turn Jonas Hector's cross in from close range to bring Cologne level, and the turnaround was complete minutes later in dubious circumstances.
Anthony Modeste lost his balance inside the penalty area under the close watch of Emir Spahic, who was adjudged to have pushed the Köln forward and was shown a red card by the referee, who pointed to the spot.
Modeste stepped up himself to put Köln in front with 10 minutes remaining, and they held on to extend their unbeaten start to the season with their second win out of three.
Stuttgart 1, Eintracht Frankfurt 4
Stuttgart remained rooted to the bottom of the Bundesliga after falling to their third defeat out of three on Saturday, a 4-1 reverse at home to Eintracht Frankfurt.
The away team took the lead when Adam Hlousek turned Haris Seferovic's header into his own goal, continuing a difficult start to the season for the Swabians and their new coach Alexander Zorniger. The hosts levelled when Geoffroy Serey Die's low cross was turned in by Daniel Didavi in an offside position, although the goal was allowed to stand. Frankfurt did not let it bother them, though, as Luc Castaignos tucked in their second on the stroke of half-time.
Things got even worse for the Swabians midway through the second half when goalkeeper Przemyslaw Tyton was sent off after he gave away a penalty, which was converted by Haris Seferovic. Castaignos then piled on the misery with his second of the game late on, completing a 4-1 win for Frankfurt and their coach Armin Veh over his former club.
Augsburg 0, Ingolstadt 1
Newly promoted Ingolstadt got the better of local rivals Augsburg 1-0 on Saturday to claim their second win of the Bundesliga season.
Markus Suttner planted a direct free-kick against the crossbar after half an hour as the visitors showed more will and determination at the Augsburg Arena in the Bavarian derby. And Ingolstadt took a deserved lead in the second half with an unstoppable 25-yard curling effort into the top right-hand corner from Mathew Leckie, just beyond the reach of Augsburg goalkeeper Marwin Hitz.
Tobias Werner wasted a glorious opportunity to equalise soon after, firing wide from just a couple of yards out with the goal at his mercy.
That summed up Augsburg's poor start to the season as they were left still waiting for their first win after three games.
Mainz 3, Hannover 0
Hannover's miserable start to the season continued on Saturday as they were beaten 3-0 by Mainz, whose summer recruit Yoshinori Muto scored his first goals for the club.
Muto beat the offside flag to put Mainz in front with his shot hitting the inside of the far post on its way past Ron-Robert Zieler in the 15th minute. The Japanese striker added a second with a close-range header after Hannover failed to clear their lines and Yunus Malli took advantage of a defensive mistake from Marcelo to make it three early in the second half.
Mainz's second win in a row puts further pressure on Hannover boss Michael Frontzeck, who watched his side slide to their second successive defeat.
Darmstadt 0, Hoffenheim 0
Darmstadt and Hoffenheim were both left still waiting for their first win of the season after sharing a 0-0 draw at the Bollenfalltor Stadion on Saturday.
After an even, competitive encounter, Hoffenheim wasted late chances to snatch all three points with Luca Caldirola proving to be Darmstadt's hero with a late goal-line clearance that denied Kevin Kuranyi his first goal back in the Bundesliga since returning from Moscow in the summer.
The draw continued Darmstadt's unbeaten return to the top flight, while it gave Hoffenheim their first point of the campaign after two defeats.