What is the current probability for "Matteo Arnaldi vs James Duckworth: Set 1 Winner"?

Current Kalshi odds for "Matteo Arnaldi vs James Duckworth: Set 1 Winner": Matteo Arnaldi 99%, James Duckworth 1% (top 2 of 2 outcomes), refreshed continuously.

When does this market resolve?

This event resolves on Sep 13, 2026.

How is the probability calculated?

pdata reads the latest market prices directly from kalshi'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/kalshi/KXATPSETWINNER-26AUG30ARNDUC-1. An MCP server with 9 tools is available at https://api.pdata.world/mcp. Full agent guide: https://pdata.world/agents.md.

closedtrade on Kalshi

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event2 outcomes

Matteo Arnaldi vs James Duckworth: Set 1 Winner

·Sports·ends Sep 13, 2026

vol cum

$86.5k

vol 24h

$86.5k

outcomes

ends

Sep 13, 2026

outcomesclick to inspect →

marketselected outcome

Matteo Arnaldi

rank #1 · resolved: yes

99¢

▲ 99.0pp

24h change

vol cum

$57.7k

vol 24h

$57.7k

spread

1.00

ends

Sep 13, 2026

If Matteo Arnaldi wins set 1 in the Matteo Arnaldi vs James Duckworth professional tennis match in the 2026 US Open Men Singles Round Of 128, then the market resolves to Yes.

timeline

opened · Aug 27, 2026closedresolved · Aug 31, 2026

Matteo Arnaldi · prices over time

−24h

now

volume · by outcomehover a column to inspect

no volume history

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