Watch: Koulibaly sent off for sarcastically applauding the referee against Inter
The referee Mazzoleni blew for a free-kick and gave Koulibaly a yellow card, correctly so, but the defender wasn't pleased with the decision. Therefore, he sarcastically applauded the referee, which led to the sending off. Take a look at the situation down below, a clear red card in many's eyes.
Video of Koulibay's sending off pic.twitter.com/bgomIRIEdC
— Isak Möller (@Isak_Moller) 26 december 2018