This market refers to the tennis match between Thiago Monteiro and Franco Agamenone in the Istanbul, originally scheduled for May 21, 2026 at 7:30AM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50. Resolution will be based on official Challenger results.

Source: official resolution criteria from Polymarket. Always verify on the source page before trading.