{"source":"gemini","id":"216980","ticker":"TENNIS-ATPUSO-20260827-NI2-SAK2","slug":"kei-nishikori-vs-rei-sakamoto","title":"Kei Nishikori vs Rei Sakamoto","description":"Kei Nishikori vs Rei Sakamoto","image":"https://assets.gemini.com/predictions/images/tennis_test_02_42aacd7e-073f-453c-a9a2-7f09d07bbc38.jpg","icon":null,"active":false,"closed":true,"start_date":"2026-08-27T01:31:09.588000Z","end_date":"2026-08-29T04:10:00Z","closed_time":"2026-08-28T18:07:09.972000Z","volume":2789.68,"volume_24hr":2779.64,"volume_24h_change":null,"normalized_vol_24hr":51.969600677490234,"normalized_volume":39.42223358154297,"liquidity":null,"open_interest":null,"categories":["Sports"],"tags":["US Open"],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Rei Sakamoto","top_outcome_probability":1.0,"top_outcome_prob_24h_change":0.39,"top_outcome_volume_24h_change":null,"updated_at":"2026-08-28T18:16:47.363573Z","fetched_at":"2026-08-28T18:16:47.363573Z","added_at":"2026-08-27T01:43:03.596504Z","url":"https://www.gemini.com/predictions/TENNIS-ATPUSO-20260827-NI2-SAK2/kei-nishikori-vs-rei-sakamoto","chart_24h":[2082.01,2142.38,2250.88,2662.92,2789.68,2779.64],"markets":[{"source":"gemini","id":"216980-521296","event_id":"216980","slug":"GEMI-TENNIS-ATPUSO-20260827-NI2-SAK2-SAK2","question":"Rei Sakamoto","group_item_title":"Rei Sakamoto","description":"This market resolves to Yes if Rei Sakamoto wins the tennis match between Rei Sakamoto and Kei Nishikori originally scheduled for August 27, 2026 at 1:40 PM ET. Otherwise, it will resolve to No. The Underlying is the official result of the specified sporting event. Source Agencies, in order, are the tournament governing body (ATP, WTA, ITF), ESPN, Fox Sports, and the broadcast partner of the event. If the Expiration Value cannot be determined on the Expiration Date (including because the event is cancelled or a player forfeits, withdraws, or is disqualified), the Exchange may determine payouts pursuant to the Market Outcome Review Process. View the [full rules](https://assets.gemini.com/predictions/terms_and_conditions/Sporting_Win_Lose_Event_2_Terms_and_Conditions_1078aa92-c5fe-42cb-9491-466335816650.pdf)","image":"https://images.ctfassets.net/jg6lo9a2ukvr/4J6VRr4hWCciq3hslGCXAK/d625172d9d6265bb9a8245301fe5bbcd/033-japan.png","icon":null,"outcomes":["Yes","No"],"outcome_prices":[1.0,0.0],"probability":1.0,"spread":0.01,"active":false,"closed":true,"start_date":"2026-08-28T05:00:00Z","end_date":"2026-08-29T04:10:00Z","closed_time":"2026-08-28T18:07:09.972000Z","volume":null,"volume_24hr":null,"prob_24h_change":0.39,"volume_24h_change":null,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-28T18:37:46.382506Z","fetched_at":"2026-08-28T18:16:47.376884Z","added_at":"2026-08-27T01:43:04.124071Z","url":"https://www.gemini.com/predictions/TENNIS-ATPUSO-20260827-NI2-SAK2/kei-nishikori-vs-rei-sakamoto","event_title":"Kei Nishikori vs Rei Sakamoto","chart_24h":[0.61,0.6,0.6,0.6,0.61,0.61,0.62,0.61,0.61,0.61,0.61,0.61,0.61,0.61,0.61,0.61,0.6,0.59,0.59,0.6,0.6,0.58,0.62,0.76,0.83,0.99,1.0]},{"source":"gemini","id":"216980-521295","event_id":"216980","slug":"GEMI-TENNIS-ATPUSO-20260827-NI2-SAK2-NI2","question":"Kei Nishikori","group_item_title":"Kei Nishikori","description":"This market resolves to Yes if Kei Nishikori wins the tennis match between Kei Nishikori and Rei Sakamoto originally scheduled for August 27, 2026 at 1:40 PM ET. Otherwise, it will resolve to No. The Underlying is the official result of the specified sporting event. Source Agencies, in order, are the tournament governing body (ATP, WTA, ITF), ESPN, Fox Sports, and the broadcast partner of the event. If the Expiration Value cannot be determined on the Expiration Date (including because the event is cancelled or a player forfeits, withdraws, or is disqualified), the Exchange may determine payouts pursuant to the Market Outcome Review Process. View the [full rules](https://assets.gemini.com/predictions/terms_and_conditions/Sporting_Win_Lose_Event_2_Terms_and_Conditions_1078aa92-c5fe-42cb-9491-466335816650.pdf)","image":"https://images.ctfassets.net/jg6lo9a2ukvr/4J6VRr4hWCciq3hslGCXAK/d625172d9d6265bb9a8245301fe5bbcd/033-japan.png","icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.0,1.0],"probability":0.0,"spread":0.01,"active":false,"closed":true,"start_date":"2026-08-28T05:00:00Z","end_date":"2026-08-29T04:10:00Z","closed_time":"2026-08-28T18:07:09.725000Z","volume":null,"volume_24hr":null,"prob_24h_change":-0.44,"volume_24h_change":null,"normalized_vol_24hr":null,"normalized_volume":null,"liquidity":null,"categories":["Sports"],"countries":[],"updated_at":"2026-08-28T18:37:46.382506Z","fetched_at":"2026-08-28T18:16:47.376884Z","added_at":"2026-08-27T01:43:04.124071Z","url":"https://www.gemini.com/predictions/TENNIS-ATPUSO-20260827-NI2-SAK2/kei-nishikori-vs-rei-sakamoto","event_title":"Kei Nishikori vs Rei Sakamoto","chart_24h":[0.44,0.43,0.43,0.44,0.45,0.44,0.44,0.44,0.44,0.43,0.44,0.43,0.43,0.43,0.43,0.43,0.43,0.44,0.45,0.45,0.44,0.44,0.42,0.42,0.28,0.21,0.02,0.0]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/gemini/216980","as_of":"2026-08-28T19:51:56.825042Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Gemini): \"Kei Nishikori vs Rei Sakamoto\" — top market at 100% probability across 2 outcomes","source_url":null}}