Borussia Dortmund extended their lead at the top of the Bundesliga to 13 points on Friday, blitzing second-placed Bayer Leverkusen with three goals in just six minutes for an impressive 3-1 away win.

Having already begun 2011 with a ten-point lead, Dortmund hit second-half goals in quick succession from teenager Mario Goetze and two from 22-year-old Kevin Grosskreutz to seal the win.