Guayaquil: Ryan Nijboer vs Mariano Kestelboim

This market refers to the tennis match between Ryan Nijboer and Mariano Kestelboim in the Guayaquil, Ecuador, Qualifying, originally scheduled for October 25, 2026 at 11:00AM ET. This market will resolve to 'Ryan Nijboer' if Ryan Nijboer advances against Mariano Kestelboim. This market will resolve to 'Mariano Kestelboim' if Mariano Kestelboim advances against Ryan Nijboer. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 8, 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 ATP Tour. A consensus of credible reporting may also be used.