The top two are heading for a final showdown on Dortmund's home ground at SignalIdunaPark on April 11 which could well decide the destination of the German title.
Dortmund's SignalIdunaPark, once the Westfalenstadion, and Bayern Munich's Allianz Arena -- both tagged by insurers -- serve as further examples of the close links with big business in Germany.
Some 65, 000 fans will still pack SignalIdunaPark on Wednesday night, and 11, 000 of them will still join together to turn the south stand into a wall of yellow and black.