Hamburg missed a chance to go second in the Bundesliga standings when they drew 0-0 at Nuremberg yesterday, while Bayer Leverkusen boosted their Champions League hopes with a 2-0 win over Hanover 96.
Hamburg played poorly against relegation candidates Nuremberg and only came away with a point thanks to a penalty save from Frank Rost at the end of the first half.
The result completed a great weekend for leaders Bayern Munich, who are seven points clear after their 2-0 win at home to Karlsruhe on Saturday.
Bayern have 50 points from 23 games, followed by Werder Bremen on 43, who suffered a humiliating 6-3 defeat at VfB Stuttgart on Saturday.
Hamburg stay third on 42, followed closely by Leverkusen on 41 after goals from Theofanis Gekas and Tranquillo Barnetta saw them to a comfortable win at home to Hanover.