TENNIS / Surface matchup context

Surface Evidence Support

Measures how much of each tour-window snapshot survives the source's minimum-match floors for clay-hard and grass comparisons.

Derived analysis4 published rows5 fieldsDate varies or is unrecorded; see scope

Published measurements

Choose a measurement

MeasurementPopulationOrder

4 matching rows; 4 contain clay-hard support.

CSV includes 4 matching rows, all fields, and source context; missing measurements stay blank. Published source dates and row provenance are included when available; structured provenance uses JSON cells.

Measured rows: 4 / 40 unavailable
Median: 5.2%Middle ranked value
Middle 50%: 0% to 11.45%25th to 75th percentile
Observed range: 0% to 14.59%Minimum to maximum

Summaries describe the filtered rows with equal row weight. Row counts are not independent game or event counts.

Measurement availability5 / 5 fields have values

Reference population: All published groups. 4 rows published.

Text search does not change this reference population.

Availability describes published values only. It does not establish data quality or independent game counts, and measurement windows can differ.

0%Clay-hard support14.59%

Showing 4 of 4 matching numeric rows. Open a row to inspect all its fields. Rankings apply only to the published subset.

01 / Interpretation

What this measures

Use this before comparing surface effects: low support means few players have enough matches for that surface contrast.

02 / Calculation

support rate = n qualifying at the source floor / n players in snapshot

Use the table to inspect available fields and the source JSON to trace the formula inputs. CSV percentage values are stored as fractions.

03 / Population & limits

ATP/WTA career and recent-form snapshots; clay-hard requires at least 25 matches on each surface and grass requires at least 15 grass matches. Career covers dated matches in the pooled 2015-2025 corpus; recent form covers matches on or after 2023-01-01 within that corpus. Recent form overlaps career; these are not independent windows.

A zero qualifying count is retained as zero; the derived support rate is zero when the snapshot denominator is positive. Coverage differences can reflect source depth rather than player characteristics.

04 / Source & method references

Published source JSON ITF classified tennis surfaces

References explain ingredients and prior methods. They do not validate this derived analysis or establish its originality.