This market refers to the tennis match between Marta Kostyuk and Jessica Pegula in the WTA Finals, Group A, originally scheduled for November 10, 2026 at 1:00PM ET. This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Jessica Pegula. This market will resolve to 'Jessica Pegula' if Jessica Pegula advances against Marta Kostyuk. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 24, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.