{"source":"polymarket","id":"1014948","ticker":"atp-grumet-ostapen-2026-09-13","slug":"atp-grumet-ostapen-2026-09-13","title":"Tiburon: Gus Grumet vs Daniil Ostapenkov","description":"This market refers to the tennis match between Gus Grumet and Daniil Ostapenkov in the Tiburon, USA, Qualifying, originally scheduled for September 13, 2026 at 4:30PM ET.\n\nThis market will resolve to 'Gus Grumet' if Gus Grumet advances against Daniil Ostapenkov.\n\nThis market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Gus Grumet.\n\nIf the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.\n\nIf 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.\n\nIf the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.\n\nThe primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","active":false,"closed":true,"start_date":"2026-09-13T05:05:49Z","end_date":"2026-09-20T20:30:00Z","closed_time":"2026-09-14T00:59:28Z","volume":11747.291448,"volume_24hr":11747.291448000002,"volume_24h_change":null,"normalized_vol_24hr":33.42958450317383,"normalized_volume":19.97568130493164,"liquidity":null,"open_interest":5103.254553,"categories":["Sports"],"tags":[{"id":"864","slug":"tennis","label":"Tennis"},{"id":"1","slug":"sports","label":"Sports"},{"id":"100639","slug":"games","label":"Games"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Completed Match","top_outcome_probability":1.0,"top_outcome_prob_24h_change":0.5,"top_outcome_volume_24h_change":2970.0,"updated_at":"2026-09-14T01:22:20.233501Z","fetched_at":"2026-09-14T01:22:20.233501Z","added_at":"2026-09-13T05:13:10.316952Z","url":"https://polymarket.com/event/atp-grumet-ostapen-2026-09-13","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,13.0,13.0,13.0,111.115658,111.115658,111.115658,111.115658,403.74677,403.74677,466.237789,475.428266,731.427924,731.427924,738.877924,5566.195565,7726.624465,11747.291448,11747.291448000002],"kind":"live","markets":[{"source":"polymarket","id":"4516205","event_id":"1014948","slug":"atp-grumet-ostapen-2026-09-13-completed-match","question":"Tiburon, USA, Qualifying: Completed Match: Gus Grumet vs Daniil Ostapenkov","group_item_title":"Completed Match","description":"This market refers to the tennis match between Gus Grumet and Daniil Ostapenkov in the Tiburon, USA, Qualifying, originally scheduled for September 13, 2026 at 4:30PM ET. This market will resolve to \"Yes\" if all games and sets required to determine a match winner under governing body or event organizer rules are played to completion through normal play. Otherwise, if the match is not completed for any reason, it will resolve to \"No.\" If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve \"No.\" If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to \"No.\" The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, a consensus of credible reporting may be used instead.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","outcomes":["Yes","No"],"outcome_prices":[1.0,0.0],"probability":1.0,"spread":0.001,"active":false,"closed":true,"start_date":"2026-09-13T05:05:49Z","end_date":"2026-09-20T20:30:00Z","closed_time":"2026-09-14T00:59:27.599914Z","volume":2970.0,"volume_24hr":2970.0,"prob_24h_change":0.5,"volume_24h_change":2970.0,"normalized_vol_24hr":27.007043838500977,"normalized_volume":18.761381149291992,"liquidity":0.0,"categories":["Sports"],"countries":[],"updated_at":"2026-09-14T01:22:20.256706Z","fetched_at":"2026-09-14T01:22:20.256706Z","added_at":"2026-09-13T05:13:10.372499Z","url":"https://polymarket.com/event/atp-grumet-ostapen-2026-09-13/atp-grumet-ostapen-2026-09-13-completed-match","event_title":"Tiburon: Gus Grumet vs Daniil Ostapenkov","chart_24h":[0.5,0.5,0.5,0.9995,1.0]},{"source":"polymarket","id":"4516204","event_id":"1014948","slug":"atp-grumet-ostapen-2026-09-13","question":"Tiburon: Gus Grumet vs Daniil Ostapenkov","group_item_title":null,"description":"This market refers to the tennis match between Gus Grumet and Daniil Ostapenkov in the Tiburon, USA, Qualifying, originally scheduled for September 13, 2026 at 4:30PM ET.\n\nThis market will resolve to 'Gus Grumet' if Gus Grumet advances against Daniil Ostapenkov.\n\nThis market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Gus Grumet.\n\nIf the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 27, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.\n\nIf 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.\n\nIf the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.\n\nThe primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/atp-tour-b4390c4fb8.jpg","outcomes":["Gus Grumet","Daniil Ostapenkov"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.001,"active":false,"closed":true,"start_date":"2026-09-13T05:05:49Z","end_date":"2026-09-20T20:30:00Z","closed_time":"2026-09-14T00:59:28Z","volume":8777.291447999998,"volume_24hr":8777.291448000002,"prob_24h_change":-0.5,"volume_24h_change":8777.291448000002,"normalized_vol_24hr":34.820556640625,"normalized_volume":24.189308166503906,"liquidity":0.0,"categories":["Sports"],"countries":[],"updated_at":"2026-09-14T01:22:20.256706Z","fetched_at":"2026-09-14T01:22:20.256706Z","added_at":"2026-09-13T05:13:10.372499Z","url":"https://polymarket.com/event/atp-grumet-ostapen-2026-09-13/atp-grumet-ostapen-2026-09-13","event_title":"Tiburon: Gus Grumet vs Daniil Ostapenkov","chart_24h":[0.5,0.225,0.34,0.33,0.225,0.22,0.21,0.195,0.2,0.205,0.2,0.215,0.22,0.2,0.16,0.175,0.205,0.205,0.19,0.18,0.2,0.2,0.2,0.055,0.0095,0.0005,0.0]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/1014948","as_of":"2026-09-14T02:54:47.020479Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"Tiburon: Gus Grumet vs Daniil Ostapenkov\" — top market at 0% probability across 2 outcomes","source_url":null}}