Playing in Signal Iduna Park with the ' Yellow Wall ' behind them , one of the loudest atmospheres in European football , should play into Dortmund 's hands .
However , Dortmund are never a team to count out .
Playing in Signal Iduna Park with the ' Yellow Wall ' behind Dortmund , one of the loudest atmospheres in European football , should play into Dortmund 's hands .
However , Dortmund are never a team to count out .