HSBC Championships: Katie Boulter vs Donna Vekic Match O/U 21.5

Event Rules

This market refers to the tennis match between Katie Boulter and Donna Vekic in the HSBC Championships, originally scheduled for June 13, 2026 at 9:00AM ET. This market will resolve to 'Katie Boulter' if Katie Boulter advances against Donna Vekic. This market will resolve to 'Donna Vekic' if Donna Vekic advances against Katie Boulter. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, 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.