Description:Bayern Munich protected their two-point lead at the top of the Bundesliga with a nervous 3-1 victory over Mainz 05 on Saturday (September 15) as champions Borussia Dortmund kept up the chase with a commanding 3-0 win against Bayer Leverkusen. Goals from Mario Mandzukic and Bastian Schweinsteiger after 13 minutes looked to have put hosts Bayern in an unassailable position but an Adam Szalai penalty on the hour set the stage for a tricky ending. (1:55)