80% winner backs underdog

This market refers to the tennis match between Arthur Rinderknech and Alexander Bublik in the Geneva Open, originally scheduled for May 21, 2026 at 1:30PM ET. This market will resolve to 'Arthur Rinderknech' if Arthur Rinderknech advances against Alexander Bublik. This market will resolve to 'Alexander Bublik' if Alexander Bublik advances against Arthur Rinderknech. 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 ATP Tour. A consensus of credible reporting may also be used.