Huub Stevens made a winning return to the Bundesliga after inspiring his Schalke side to a 2-1 victory at Hamburg.
Stevens, who held talks with Hamburg over their coaching vacancy before joining the Gelsenkirchen club on Tuesday, was indebted to Klaas Jan Huntelaar for the three points.
The Holland striker opened the scoring after 13 minutes, heading in Marco Hoger's cross, only for Mladen Petric to level seven minutes before half-time. Huntelaar grabbed the winner with 17 minutes to go, cleverly flicking in Christian Fuchs' centre.
Werder Bremen failed in their bid to join Bayern Munich at the top of the table as they were beaten 3-2 by Hannover in an entertaining northern derby.
Mohammed Abdellaoue scored a hat-trick for the Reds with Marko Arnautovic netting and receiving a red card for Bremen.
Claudio Pizarro gave Bremen hope of getting a point when he made it 3-2 in the 83rd minute, but Thomas Schaaf's men could not find an equaliser with just 10 men.