The Polymarket submarket for whether the UFC Fight Night matchup between Kamaru Usman and Dricus du Plessis will be won by KO/TKO saw the probability of “Yes” fall sharply to 37% from 62.5% one hour earlier, a 25.5-point drop. According to ChainCatcher, Catcher Predict monitoring showed the swing was driven by recent breaking news affecting the event.