What is the current probability for "National Bank Open: Marta Kostyuk vs Iga Swiatek"?

Current Polymarket odds for "National Bank Open: Marta Kostyuk vs Iga Swiatek": National Bank Open: Marta Kostyuk vs Iga Swiatek Set 1 O/U 8.5 67%, Completed Match 50%, National Bank Open: Marta Kostyuk vs Iga Swiatek Set 2 O/U 8.5 50% (top 3 of 16 outcomes), refreshed continuously.

When does this market resolve?

This event resolves on 8/16/2026.

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/809277. 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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event16 outcomes

National Bank Open: Marta Kostyuk vs Iga Swiatek

·Sports·ends Aug 16, 2026

vol cum

$23.3k

vol 24h

$23.3k

outcomes

ends

Aug 16, 2026

outcomesclick to inspect →

showing 5 of 16

TennisSportsGames

marketselected outcome

National Bank Open: Marta Kostyuk vs Iga Swiatek Set 1 O/U 8.5

rank #1

67¢

▲ 18.0pp

24h change

vol cum

vol 24h

spread

0.06

ends

Aug 16, 2026

This market refers to the tennis match between Marta Kostyuk and Iga Swiatek in the National Bank Open, originally scheduled for August 9, 2026 at 10:00AM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game toward the total. If 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. Resolution will be based on official WTA results.

timeline

opened · Aug 7, 2026opencloses · Aug 16, 2026

National Bank Open: Marta Kostyuk vs Iga Swiatek Set 1 O/U 8.5 · prices over time

−24h

now

volume · by outcomehover a column to inspect

no volume history

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