Question 1

What is the current probability for "Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas"?

Accepted Answer

Current Polymarket odds for "Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas": Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas Set 1 O/U 8.5 65%, Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas Set 2 Winner 62%, Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas Match O/U 21.5 54% (top 3 of 15 outcomes), refreshed continuously.

Question 2

When does this market resolve?

Accepted Answer

This event resolves on 8/20/2026.

Question 3

How is the probability calculated?

Accepted Answer

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.

Question 4

Where can I get this data programmatically?

Accepted Answer

The JSON endpoint is https://api.pdata.world/api/v1/events/polymarket/836949. An MCP server with 9 tools is available at https://api.pdata.world/mcp. Full agent guide: https://pdata.world/agents.md.

Cincinnati Open: Valentin Royer vs Stefanos Tsitsipas

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