{"source":"gemini","id":"202263","ticker":"TENNIS-WTACIN-20260819-KOS-AND","slug":"marta-kostyuk-vs-mirra-andreeva","title":"Marta Kostyuk vs Mirra Andreeva","description":"Marta Kostyuk vs Mirra Andreeva","image":"https://assets.gemini.com/predictions/images/tennis_test_02_42aacd7e-073f-453c-a9a2-7f09d07bbc38.jpg","icon":null,"active":false,"closed":true,"start_date":"2026-08-18T23:13:02.233000Z","end_date":"2026-08-20T05:00:00Z","closed_time":"2026-08-19T18:45:55.632000Z","volume":18900.77,"volume_24hr":18900.77,"volume_24h_change":null,"normalized_vol_24hr":60.724117279052734,"normalized_volume":60.724117279052734,"liquidity":null,"open_interest":null,"categories":["Sports"],"tags":["WTA"],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Marta Kostyuk","top_outcome_probability":1.0,"top_outcome_prob_24h_change":0.51,"top_outcome_volume_24h_change":null,"updated_at":"2026-08-19T18:50:09.700358Z","fetched_at":"2026-08-19T18:50:09.700358Z","added_at":"2026-08-18T23:24:25.109052Z","url":"https://www.gemini.com/predictions/TENNIS-WTACIN-20260819-KOS-AND/marta-kostyuk-vs-mirra-andreeva","chart_24h":[0.0,100.0,110.04,120.29,139.34,3213.08,10295.77,18900.77],"markets":[{"source":"gemini","id":"202263-485214","event_id":"202263","slug":"GEMI-TENNIS-WTACIN-20260819-KOS-AND-KOS","question":"Marta Kostyuk","group_item_title":"Marta Kostyuk","description":"This market resolves to Yes if Marta Kostyuk wins the tennis match between Marta Kostyuk and Mirra Andreeva scheduled for August 19, 2026 at 1:00 PM ET. 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