Second-placed Bayer Leverkusen recovered from Wednesday's 5-0 home defeat by Manchester United in the Champions League to beat winless Nuremberg 3-0 with Son Heung-Min scoring twice.
Third-placed Borussia Dortmund also won as two Robert Lewandowski penalties helped them beat coach Juergen Klopp's former club Mainz 05 3-1 and Hoffenheim were involved in another high-scoring game as they drew 4-4 with Werder Bremen.
Bayern, who have won 12 and draw two of their 14 games, lead on 38 points, followed by Leverkusen (34) and Dortmund (31).
Image: Bayern Munich's Arjen Robben (left) and Thomas Mueller celebrate
Photograph: Michael Dalder/Reuters
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