Hamburg - Indifferent Bayern Munich have Bundesliga history on their side when they host Energie Cottbus while the omens are not good for TSG Hoffenheim.
Munich have won all five previous home games against the bottom side Cottbus and hope to complete the half dozen on Saturday after throwing away a 2-0 lead for the third time this season in a 2-2 draw at Borussia Moenchengladbach last weekend.
Hoffenheim, meanwhile, travel to Cologne for a meeting of promoted sides. Cologne were the only team to beat Hoffenheim twice last season in the second division.
Leaders Bayer Leverkusen are also not assured of winning at Arminia Bielefeld, having beaten them only once in their last seven league dates and last won there in 1999.