Ingolstadt and Darmstadt made themselves at home in the Bundesliga by picking up points in their opening matches of the season.
Having been crowned second-tier champions last season, Ingolstadt were indebted to Lukas Hinterseer's 66th-minute strike in their 1-0 triumph at Mainz.
Darmstadt, also promoted last term, twice led in their match at home to Hannover, but had to settle for a 2-2 draw.
Marcel Heller netted twice for the hosts, the first -– a fine solo effort – ending Darmstadt's 33-year wait for a Bundesliga goal.
Charlison Benschop cancelled out that opener early in the second half and Heller's hopes of being the match-winner were scuppered again when his second effort was eclipsed by Aytac Sulu's own goal, with Hannover's Mevlut Erdinc having earlier missed a penalty.
There was a positive start to Andre Breitenreiter's reign as Schalke boss as they ran out 3-0 winners at Werder Bremen, Eric Maxim Choupo-Moting and Klaas-Jan Huntelaar scoring for the Gelsenkirchen club after Bremen defender Theodor Gebre Selassie had put through his own goal to open the scoring.
Bayer Leverkusen came from a goal behind to beat Hoffenheim 2-1 - Julian Brandt grabbing the winner with 19 minutes to go - while Salomon Kalou's penalty saw Hertha Berlin beat Augsburg 1-0 in a match that saw both sides finish with 10 men.
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