{"source":"kalshi","id":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","ticker":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","slug":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","title":"Klaassen / Papa vs Ayeni / Ostapenkov","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-09-25T09:40:00Z","end_date":"2026-10-09T21:30:00Z","closed_time":null,"volume":14350.54,"volume_24hr":9541.1,"volume_24h_change":null,"normalized_vol_24hr":26.961315155029297,"normalized_volume":24.76268196105957,"liquidity":null,"open_interest":13183.09,"categories":["Sports"],"tags":[],"synthetic":false,"is_group":false,"group_key":"26SEP25KLAPAPAVEOST","parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Stian Klaassen / Christopher Papa","top_outcome_probability":0.91,"top_outcome_prob_24h_change":0.91,"top_outcome_volume_24h_change":3240.5,"updated_at":"2026-09-25T22:29:49.059748Z","fetched_at":"2026-09-25T22:29:49.059748Z","added_at":"2026-09-25T09:43:22.287481Z","url":"https://kalshi.com/markets/kxatpchallengerdoubles/klaassen-papa-vs-ayeni-ostapenkov/kxatpchallengerdoubles-26sep25klapapaveost","chart_24h":[0.0,12.0,29.05,29.05,1002.14,1012.98,1107.93,2133.09,9541.1],"kind":"live","markets":[{"source":"kalshi","id":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST-KLAPAP","event_id":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","slug":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST-KLAPAP","question":"Stian Klaassen / Christopher Papa wins","group_item_title":"Stian Klaassen / Christopher Papa","description":"If Stian Klaassen / Christopher Papa wins the Klaassen / Papa vs Ayeni / Ostapenkov professional tennis match in the 2026 ATP Challenger San Diego 2 Semifinal after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Klaassen / Papa vs Ayeni / Ostapenkov professional tennis match in the 2026 ATP Challenger San Diego 2 Semifinal after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks).\n\nKalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.91,0.08999999999999997],"probability":0.91,"spread":0.029999999999999916,"active":true,"closed":false,"start_date":"2026-09-25T09:40:00Z","end_date":"2026-10-09T21:30:00Z","closed_time":"2026-10-09T21:30:00Z","volume":6222.12,"volume_24hr":3240.5,"prob_24h_change":0.91,"volume_24h_change":3240.5,"normalized_vol_24hr":22.68027114868164,"normalized_volume":23.757858276367188,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-09-25T22:29:49.657432Z","fetched_at":"2026-09-25T22:29:49.657432Z","added_at":"2026-09-25T09:43:22.399123Z","url":"https://kalshi.com/markets/kxatpchallengerdoubles/klaassen-papa-vs-ayeni-ostapenkov/kxatpchallengerdoubles-26sep25klapapaveost","event_title":"Klaassen / Papa vs Ayeni / Ostapenkov","chart_24h":[0.0,0.52,0.52,0.52,0.52,0.47,0.47,0.47,0.47,0.47,0.42,0.91]},{"source":"kalshi","id":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST-AVEOST","event_id":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","slug":"KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST-AVEOST","question":"Alafia Ayeni / Daniil Ostapenkov wins","group_item_title":"Alafia Ayeni / Daniil Ostapenkov","description":"If Alafia Ayeni / Daniil Ostapenkov wins the Klaassen / Papa vs Ayeni / Ostapenkov professional tennis match in the 2026 ATP Challenger San Diego 2 Semifinal after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Klaassen / Papa vs Ayeni / Ostapenkov professional tennis match in the 2026 ATP Challenger San Diego 2 Semifinal after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks).\n\nKalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.13,0.87],"probability":0.13,"spread":0.05,"active":true,"closed":false,"start_date":"2026-09-25T09:40:00Z","end_date":"2026-10-09T21:30:00Z","closed_time":"2026-10-09T21:30:00Z","volume":8128.42,"volume_24hr":6300.6,"prob_24h_change":0.13,"volume_24h_change":6300.6,"normalized_vol_24hr":26.563854217529297,"normalized_volume":25.233501434326172,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-09-25T22:29:49.657432Z","fetched_at":"2026-09-25T22:29:49.657432Z","added_at":"2026-09-25T09:43:22.399123Z","url":"https://kalshi.com/markets/kxatpchallengerdoubles/klaassen-papa-vs-ayeni-ostapenkov/kxatpchallengerdoubles-26sep25klapapaveost","event_title":"Klaassen / Papa vs Ayeni / Ostapenkov","chart_24h":[0.0,0.48,0.59,0.59,0.59,0.59,0.59,0.75,0.75,0.58,0.57,0.73,0.13]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXATPCHALLENGERDOUBLES-26SEP25KLAPAPAVEOST","as_of":"2026-09-25T22:44:05.189270Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Klaassen / Papa vs Ayeni / Ostapenkov\" — top market at 13% probability across 2 outcomes","source_url":null}}