Set 1 Winner: Kalinina vs Osaka

This market refers to the tennis match between Anhelina Kalinina and Naomi Osaka in the Madrid Open, originally scheduled for April 25, 2026 at 5:00AM ET. This market will resolve to “Kalinina” if Anhelina Kalinina wins the first set. It will resolve to “Osaka” if Naomi Osaka wins the first set. If the match begins but is not completed, and the first set is concluded with a winner determined, this market will resolve based on that completed set. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled (not played at all) or is delayed beyond 7 days from the scheduled date without play beginning, this market will resolve 50-50. Resolution will be based on official WTA match statistics.