Piszczek’s goal in the 90th minute ended Dortmund’s three-game run without a win.
Schalke won its first game since the sudden departure of coach Ralf Rangnick by beating Freiburg 4-2.
Wolfsburg beat Kaiserslautern 1-0 despite being down to 10 men, Borussia Moenchengladbach stayed at the top with a 1-0 victory over Nuremberg and promoted Augsburg is still winless after drawing 0-0 at home with Hannover.
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