Hamburg take top spot in Bundesliga on goal difference from Bayer 04 . Javier Guerrero scores twice in 2 - 1 victory at home to bottom club Cologne . Werder Bremen move up to third following a 3 - 2 win at struggling Hertha Berlin . Bremen join Schalke and Borussia Monchengladbach on seven points .
Hamburg take top spot in Bundesliga on goal difference from Bayer Leverkusen . Paolo Guerrero scores twice in 3-1 victory at home to bottom club Cologne . Werder Bremen move up to third following a 3-2 win at struggling Hertha Berlin . Bremen join Schalke and Borussia Monchengladbach on seven points .