Sebastien Haller and Marco Reus both scored twice as Borussia Dortmund thrashed Cologne 6-1 on Saturday, sending the home side top of the Bundesliga ahead of Bayern Munich. Donyell Malen and Raphael Guerreiro also got on the scoresheet as Dortmund moved a point clear of Bayern, who visit Bayer Leverkusen on Sunday. Dortmund stormed into
