This market refers to the tennis match between Daniel Altmaier and Ben Shelton in the Hamburg European Open, originally scheduled for May 19, 2026 at 12:00PM ET. This market will resolve to 'Daniel Altmaier' if Daniel Altmaier advances against Ben Shelton. This market will resolve to 'Ben Shelton' if Ben Shelton advances against Daniel Altmaier. 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.