Borussia Dortmund condemned Diego Simeone to his heaviest defeat as Atletico Madrid manager with a 4-0 win on Wednesday.
The Bundesliga leaders were in rampant form in the Champions League encounter at Signal Iduna Park, scoring three second-half goals to earn a lopsided victory.
Axel Witsel scored in the first half before a Raphael Guerreiro double and a Jadon Sancho goal sent Dortmund to the top of Group A.
It was an historic defeat for Simeone, who has been in charge of Atletico since 2011.
During his time in charge the Argentine has transformed the Rojiblancos into one of the fiercest defensive sides in Europe.