The coaches of Borussia Dortmund and Schalke joined forces to criticise a contentious penalty following Saturday's polemic Revierderby.
Dortmund's Bundesliga hopes took a huge hit at Signal Iduna Park as they were downed 4-2 by their rivals.
The hosts took the lead against Schalke through Mario Gotze, but saw both Marco Reus and Marius Wolf sent off while Daniel Caligiuri hit twice to send his team on the way to victory.
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But it was Caligiuri's first strike from the spot which drew the wrath of BVB coach Lucien Favre, who could not believe his team was sanctioned for a seemingly innocuous handball.