Bayern Munich laboured to a 4-2 victory from a goal down to Werder Bremen on Sunday to extend their advantage atop the Bundesliga to 16 points.

League top-scorer Robert Lewandowski and Thomas Mueller both struck doubles to secure the win despite a courageous performance from lowly Werder.

Bremen, who remain in the relegation play-off place, had led through Jerome Gondorff but Mueller levelled before half-time. An own goal from Niklas Suele cancelled Lewandowski's first but Bremen could not answer his second and Mueller made the game safe.

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