Viktor Kassai

Viktor Kassai is a Hungarian football official and a former referee who is the current head of refereeing department of the Bulgarian Football Union. He participated in the 2010 FIFA World Cup and refereed the 2011 UEFA Champions League Final. He was also the referee for the infamous 2017 game between Madrid and Bayern. He has been a full international referee for FIFA since 2003. He retired as a referee on 30 December 2019. Wikipedia