Soon, the warmups for both sides began to wind down.
Players drifted back toward the tunnel in ones and twos, and despite the interval, the stadium didn't rest.
The announcer's voice came across the public address system, trying to rile up the fans in anticipation of the match that was threatening to begin.
"Meine Damen und Herren, willkommen im Signal Iduna Park. Heute Abend empfangen wir Wigan Athletic, zu Gast bei unserem BVB."
[Ladies and gentlemen, welcome to the Signal Iduna Park. Tonight we welcome Wigan Athletic, guests of our BVB.]
The ground responded fully, with the noise barreling down from the upper stands to the lower tiers near the pitch.
As the noise reached a crescendo, the two sides emerged from the tunnel and walked out into it.
The Dortmund players came out again to the familiar tone of the crowd greeting them.
Behind the goal, the Yellow Wall was in full voice, sounding like a continuous orchestra.
