During the fight between Austrian Wihelm Ott and Montenegrin Nihad Nasufovich, which took place as part of the German MMA promotion Aggrelin 19, the judge did not notice how Ott began to hit the floor during a choke hold. Nasufovich himself let go of his opponent, after which he attacked the referee with his fists. The fighter, dissatisfied with the work of the judge, struck him twice, after which they separated.