The US Open men's singles final on September 13 features an all-American semifinal matchup between Ben Shelton and Frances Tiafoe, guaranteeing a U.S. player in the championship match for the first time in over two decades and heightening interest among domestic celebrities and tennis figures. Recent quarterfinal results, including Shelton's record-late upset of defending champion Carlos Alcaraz, have amplified tournament visibility and potential attendance by high-profile guests tied to fashion, entertainment, and the sport. Women's semifinal positioning, with Aryna Sabalenka facing Jessica Pegula and Elena Rybakina set against Coco Gauff, adds further draw for attendees. Traders weigh historical patterns of repeat visitors like designers and former players against any late schedule conflicts or unannounced appearances that could shift implied probabilities in this multi-outcome market.