{"_meta":{"attribution":"Data aggregated by pdata.world (https://pdata.world) from 8 prediction-market venues; CC BY 4.0; source data © each venue.","canonical_url":"https://pdata.world/events/kalshi/KXATPDOUBLES-26OCT29MICVANARROLI","as_of":"2026-10-29T22:45:43.506797Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Michelsen / van de Zandschulp vs Arribage / Olivetti\" — resolved: \"Theo Arribage / Albano Olivetti\" (closed 2026-10-29). https://pdata.world/events/kalshi/KXATPDOUBLES-26OCT29MICVANARROLI","source_url":"https://kalshi.com/markets/kxatpdoubles/michelsen-van-de-zandschulp-vs-arribage-olivetti/kxatpdoubles-26oct29micvanarroli"},"source":"kalshi","id":"KXATPDOUBLES-26OCT29MICVANARROLI","ticker":"KXATPDOUBLES-26OCT29MICVANARROLI","slug":"KXATPDOUBLES-26OCT29MICVANARROLI","title":"Michelsen / van de Zandschulp vs Arribage / Olivetti","description":null,"image":null,"icon":null,"active":false,"closed":true,"start_date":"2026-10-28T16:15:00Z","end_date":"2026-11-12T10:00:00Z","closed_time":"2026-10-29T19:39:57Z","volume":9861.76,"volume_24hr":9861.76,"volume_24h_change":null,"normalized_vol_24hr":28.480430603027344,"normalized_volume":22.618022918701172,"liquidity":null,"open_interest":8174.469999999999,"categories":["Sports"],"tags":[],"synthetic":false,"is_group":false,"group_key":"26OCT29MICVANARROLI","parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Theo Arribage / Albano Olivetti","top_outcome_probability":0.99,"top_outcome_prob_24h_change":0.99,"top_outcome_volume_24h_change":3856.38,"updated_at":"2026-10-29T19:46:26.680257Z","fetched_at":"2026-10-29T19:46:26.680257Z","added_at":"2026-10-28T16:24:30.749324Z","url":"https://kalshi.com/markets/kxatpdoubles/michelsen-van-de-zandschulp-vs-arribage-olivetti/kxatpdoubles-26oct29micvanarroli","chart_24h":[97.18,100.18,105.14,112.33000000000001,119.53,159.65,162.83,225.01,225.01,364.77,436.82000000000005,1894.77,8123.76,9861.76],"kind":"live","mutually_exclusive":true,"markets_total":2,"markets":[{"source":"kalshi","id":"KXATPDOUBLES-26OCT29MICVANARROLI-ARROLI","event_id":"KXATPDOUBLES-26OCT29MICVANARROLI","slug":"KXATPDOUBLES-26OCT29MICVANARROLI-ARROLI","question":"Theo Arribage / Albano Olivetti wins","group_item_title":"Theo Arribage / Albano Olivetti","description":"If Theo Arribage / Albano Olivetti wins the Michelsen / van de Zandschulp vs Arribage / Olivetti professional tennis match in the 2026 ATP Basel Quarterfinal after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Michelsen / van de Zandschulp vs Arribage / Olivetti professional tennis match in the 2026 ATP Basel Quarterfinal 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":[0.99,0.010000000000000009],"probability":0.99,"spread":1.0,"active":false,"closed":true,"start_date":"2026-10-28T16:15:00Z","end_date":"2026-11-12T10:00:00Z","closed_time":"2026-10-29T19:39:57Z","result":"yes","volume":3856.38,"volume_24hr":3856.38,"prob_24h_change":0.99,"volume_24h_change":3856.38,"normalized_vol_24hr":25.822689056396484,"normalized_volume":21.2276611328125,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-10-29T19:46:26.723144Z","fetched_at":"2026-10-29T19:46:26.723144Z","added_at":"2026-10-28T16:24:30.926038Z","url":"https://kalshi.com/markets/kxatpdoubles/michelsen-van-de-zandschulp-vs-arribage-olivetti/kxatpdoubles-26oct29micvanarroli","event_title":"Michelsen / van de Zandschulp vs Arribage / Olivetti","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.69,0.69,0.68,0.68,0.68,0.68,0.65,0.66,0.66,0.65,0.65,0.68,0.99,0.99]},{"source":"kalshi","id":"KXATPDOUBLES-26OCT29MICVANARROLI-MICVAN","event_id":"KXATPDOUBLES-26OCT29MICVANARROLI","slug":"KXATPDOUBLES-26OCT29MICVANARROLI-MICVAN","question":"Alex Michelsen / Botic Van de Zandschulp wins","group_item_title":"Alex Michelsen / Botic Van de Zandschulp","description":"If Alex Michelsen / Botic Van de Zandschulp wins the Michelsen / van de Zandschulp vs Arribage / Olivetti professional tennis match in the 2026 ATP Basel Quarterfinal after a ball has been played, then the market resolves to Yes.\n\n---\n\nThe following market refers to the Michelsen / van de Zandschulp vs Arribage / Olivetti professional tennis match in the 2026 ATP Basel Quarterfinal 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":[0.01,0.99],"probability":0.01,"spread":1.0,"active":false,"closed":true,"start_date":"2026-10-28T16:15:00Z","end_date":"2026-11-12T10:00:00Z","closed_time":"2026-10-29T19:39:57Z","result":"no","volume":6005.38,"volume_24hr":6005.38,"prob_24h_change":0.01,"volume_24h_change":6005.38,"normalized_vol_24hr":28.666513442993164,"normalized_volume":23.565439224243164,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-10-29T19:46:26.723144Z","fetched_at":"2026-10-29T19:46:26.723144Z","added_at":"2026-10-28T16:24:30.926038Z","url":"https://kalshi.com/markets/kxatpdoubles/michelsen-van-de-zandschulp-vs-arribage-olivetti/kxatpdoubles-26oct29micvanarroli","event_title":"Michelsen / van de Zandschulp vs Arribage / Olivetti","chart_24h":[0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.36,0.29,0.29,0.29,0.29,0.29,0.37,0.37,0.37,0.36,0.34,0.35,0.31,0.03,0.01]}]}