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This market refers to the tennis match between Gianmarco Ferrari and Sergio Callejon in the Cattolica, originally scheduled for June 9, 2026 at 4:00AM ET. This market will resolve to 'Gianmarco Ferrari' if Gianmarco Ferrari advances against Sergio Callejon. This market will resolve to 'Sergio Callejon' if Sergio Callejon advances against Gianmarco Ferrari. 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.