Robert Lewandowski scored the winner as Borussia Dortmund extended their lead to a remarkable 15 points in the Bundesliga with a 1-0 triumph at home to 1. FC Köln.
The Polish international fired in from the edge of the area a minute before half-time to make it 19 wins from 25 league games for Jürgen Klopp's men. The margin of victory could have been greater had Lucas Barrios and Nuri Sahin not been denied by the crossbar while goalkeeper Michael Rensing made several fine saves to keep the visitors in the contest.
Second-placed Bayer 04 Leverkusen host VfL Wolfsburg on Saturday as they bid to reduce the deficit while third meets fourth when Hannover 96 host UEFA Champions League contenders FC Bayern München.
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