
Prediction market · Polymarket
This market refers to the tennis match between Sloane Stephens and Anhelina Kalinina in the Madrid Open, Qualification, originally scheduled for April 21, 2026 at 8:00AM ET. This market will resolve to 'Sloane Stephens' if Sloane Stephens advances against Anhelina Kalinina. This market will resolve to 'Anhelina Kalinina' if Anhelina Kalinina advances against Sloane Stephens. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If 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. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.
Ticker
wta-stephen-kalinin-2026-04-21
Volume
1.3M
24h volume
1.3M
1w volume
1.3M
Open interest
775.0K
Liquidity
—
Start
Apr 20, 2026
End
Apr 28, 2026
Status
Closed
Access
Restricted
Created
Apr 21, 2026
Resolution source
https://www.wtatennis.com/scores
Event ID
400801
Slug
wta-stephen-kalinin-2026-04-21
Markets
10
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"description": "This market refers to the tennis match between Sloane Stephens and Anhelina Kalinina in the Madrid Open, Qualification, originally scheduled for April 21, 2026 at 8:00AM ET.\nThis market will resolve to \"Over\" if the total number of games completed in the first set equals or exceeds 10. Otherwise, it will resolve to \"Under.\"\nAny first-set tiebreak counts as one (1) game toward the total.\nIf the first set is not completed for any reason, this market will resolve 50-50. If the match is canceled before play begins, or delayed beyond 7 days without commencement, this market will also resolve 50-50.\nResolution will be based on official WTA results.",
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"question": "Stephens vs. Kalinina: Match O/U 23.5",
"conditionId": "0xbc871424dcc8a2dd9e78ad1ae00543eb88abb5ef6339cec0663ff681c2518ac0",
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"description": "This market refers to the tennis match between Sloane Stephens and Anhelina Kalinina in the Madrid Open, Qualification, originally scheduled for April 21, 2026 at 8:00AM ET.\nThis market will resolve to \"Over\" if the total number of games completed across all sets equals or exceeds 24. Otherwise, it will resolve to \"Under.\"\nAll tiebreaks—including any Champions/Super tiebreak—count as one (1) game toward the total.\nIf the match begins but is not completed, this market will resolve 50-50. If the match is canceled before play begins or delayed beyond 7 days from the scheduled date without a result, this market will also resolve 50-50.\nResolution will be based on official WTA statistics.",
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"question": "Set 1 Winner: Stephens vs Kalinina",
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