Bayern Munich won 2-0 in Augsburg to extend its lead in the Bundesliga as defending champion Borussia Dortmund went down 3-2 with 10 men at home against Wolfsburg on Saturday.
Dortmund and its 80,000 fans were left fuming at FIFA referee Wolfgang Stark, who sent off defender Marcel Schmelzer in the first half and awarded a penalty to Wolfsburg, which also had reason to complain.
Goals from Thomas Mueller and Mario Gomez helped to lift Bayern 14 points ahead of Dortmund.
Bayern is also 11 points ahead of Bayer Leverkusen, which plays on Sunday in Hannover.
Vedad Ibisevic scored a hat trick for Stuttgart to beat Schalke 3-1. Freiburg beat Greuther Fuerth 1-0 and Nuremberg blanked Fortuna Duesseldorf 2-0 in other matches.