What is the current probability for "Cincinnati Open: Marta Kostyuk vs Mirra Andreeva"?

Current Polymarket odds for "Cincinnati Open: Marta Kostyuk vs Mirra Andreeva": Cincinnati Open: Marta Kostyuk vs Mirra Andreeva Set 2 O/U 8.5 75%, Cincinnati Open: Marta Kostyuk vs Mirra Andreeva Set 1 O/U 8.5 71%, Cincinnati Open: Marta Kostyuk vs Mirra Andreeva Match O/U 21.5 54% (top 3 of 15 outcomes), refreshed continuously.

When does this market resolve?

This event resolves on 8/26/2026.

How is the probability calculated?

pdata reads the latest market prices directly from polymarket's public API and normalizes them to a 0-100 probability scale. See https://pdata.world/methodology for details on per-platform conventions.

Where can I get this data programmatically?

The JSON endpoint is https://api.pdata.world/api/v1/events/polymarket/872845. An MCP server with 9 tools is available at https://api.pdata.world/mcp. Full agent guide: https://pdata.world/agents.md.

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event15 outcomes

Cincinnati Open: Marta Kostyuk vs Mirra Andreeva

·Sports·ends Aug 26, 2026

vol cum

$29.7k

vol 24h

$29.7k

outcomes

ends

Aug 26, 2026

outcomesclick to inspect →

showing 5 of 15

TennisSportsGames

marketselected outcome

Cincinnati Open: Marta Kostyuk vs Mirra Andreeva Set 2 O/U 8.5

rank #1

75¢

▲ 25.0pp

24h change

vol cum

vol 24h

spread

0.49

ends

Aug 26, 2026

This market refers to the tennis match between Marta Kostyuk and Mirra Andreeva in the Cincinnati Open, originally scheduled for August 19, 2026 at 11:00AM ET. This market will resolve to "Over" if the total number of games completed in set 2 equals or exceeds 9. Otherwise, it will resolve to "Under." Any tiebreak in set 2 counts as one (1) game toward the total. If set 2 is not completed for any reason (including the match ending before set 2 is reached), 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. Resolution will be based on official WTA results.

timeline

opened · Aug 18, 2026opencloses · Aug 26, 2026

Cincinnati Open: Marta Kostyuk vs Mirra Andreeva Set 2 O/U 8.5 · prices over time

−24h

now

volume · by outcomehover a column to inspect

no volume history

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