Berlin - Bottom side Hamburg have just five games left to avoid a historic relegation from the Bundesliga following their 1-0 defeat at Werder Bremen in Sunday's north German derby.
Bremen's Argentine striker Franco di Santo claimed his 13th goal of the season by netting an 84th-minute penalty just after Hamburg's Swiss midfielder Valon Behrami was sent off for fouling Werder's Zlatko Junuzovic in the area.
Hamburg have now lost their last five games and taken just two points in their last nine matches as Bruno Labbadia suffered defeat in his first game since being appointed as Hamburg's fourth coach this season on Wednesday.
As the only side to have never been relegated from Germany's top flight, Hamburg are four points from safety having only avoided the drop last season by winning a play-off.
Meanwhile leaders Bayern Munich are on the verge of a third Bundesliga title after Saturday's hard-fought 2-0 win at Hoffenheim, but have fresh injury worries for Tuesday's crucial clash against Porto.
Bayern face a make-or-break Champions League quarter-final second leg against Porto in Munich having lost 3-1 in Portugal in the first leg, but have eight players injured.
Left-back Juan Bernat had to be helped off after a bone-crunching first-half tackle in Hoffenheim, but coach Pep Guardiola said the Spaniard was only taken off as a precaution: "We didn't want to take any risks".
With second-placed Wolfsburg at home to Schalke on Sunday, Bayern extended their lead to 13 points with five games left.
AFP
