Bayern Munich were humiliated 5-2 on Saturday by Werder Bremen in one of the worst home defeats for the Bundesliga champions, reported dpa.
Markus Rosenberg struck twice, with Naldo, Mesut Ozil and Claudio Pizarro also on target for a 5-0 Bremen lead before their former player Tim Borowski got the consolation goals.
Munich lost their first competitive game under new coach Juergen Klinsmann.
Schalke 04 defeated 10-man Eintracht Frankfurt 1-0 to move to the top of the standings at least until Sunday, Hertha Berlin won 1-0 at Borussia Moenchengladbach, Bielefeld defeated Cologne 2-0, and bottom club Energie Cottbus were held 1-1 by VfL Bochum.