Schalke failed to join Bayern Munich and Werder Bremen at the top of the Bundesliga as they were beaten 2-1 by Wolfsburg.
Raul gave the Royal Blues a good start with a goal in the 13th minute, but two goals from Mario Mandzukic turned the game around to earn the Wolves only their second win of the season and end a run of three defeats.
The win would have been even more satisfying for their coach Felix Magath, who left Schalke under a storm cloud in March.
Timmy Simons scored twice in five minutes from the penalty spot to earn Nurnberg a 2-1 victory at Cologne.
The veteran Belgian stuck both spot-kicks into the bottom left corner before Adil Chihi pulled one back for Cologne before half-time.
Nurnberg had Tomas Pekhart sent off for a second yellow card three minutes before the break, but the hosts could not take advantage and Miso Brecko's dismissal 15 minutes from time evened up the numbers.