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Prediction market on polymarket. This market refers to the tennis match between Quentin Halys and Facundo Acosta in the US Open ATP, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to “Halys” if Quentin Halys wins set 4. It will resolve to “Acosta” if Facundo Acosta wins set 4. If the match begins but set 4 is not completed with a winner determined (including the match ending before set 4 is reached), this market will resolve 50-50. If the match is canceled (not played at all) or play has not begun by September 13, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve 50-50. Resolution will be based on official Grand Slam match statistics.
Resolves: 9/6/2026.