Catcher Predict monitoring showed a sharp move in Polymarket’s “Winston-Salem Tennis Open: Pablo Carreño Busta vs. Adolfo Vallejo” event, where the Over option in the “Total Games in the Second Set O/U 8.5” sub-market saw its implied winning probability climb to 50% from 30% an hour earlier, a 20 percentage-point swing. The size of the move points to a sudden reassessment of whether the total games in the second set would exceed 8.5. Market participants were cautioned to weigh the potential impact of related breaking news on the contract’s pricing.