Bayern Munich have been left licking their wounds after being trounced 5-2 by Werder Bremen on Saturday evening.
Jurgen Klinsmann suffered his first defeat at the helm of the reigning Bundesliga champions after his side produced a dismal first-half performance at the Allianz Arena.
Werder raced into a 3-0 lead courtesy of goals from Markus Rosenberg, Naldo and Mesut Ozil.
Rosenberg and Claudio Pizarro added insult to injury with further strikes for the visitors, before substitute Tim Borowski added some respectability to the scoreline with two late goals.
Elsewhere on Saturday, Schalke moved to the top of the table with a 1-0 win over ten-man Eintracht Frankfurt.
Patrick Ochs' own goal provided decisive at the Arena AufSchalke.
Arminia Bielefeld were 2-0 winners over Cologne following late goals from Jonas Kamper and Artur Wichniarek.
Gojko Kacar's early strike was enough for Hertha Berlin to edge out Borussia Monchengladbach.
Meanwhile, Energie Cottbus slipped to the foot of the table despite drawing 1-1 with Bochum at the Stadion der Freundschaft.