TENNIS / Surface windows

Grass-overall gap across overlapping windows

Grass gap is grass win rate minus overall win rate, where overall includes grass; grass has at least 15 matches in its own window. Compare source-career (available 2015-2025) with recent form on or after 2023-01-01.

Derived analysis44 published rows3 fieldsSource as of 2026-07-19

Window context

Grass versus pooled overall gap

Each row keeps its distinct baseline visible before comparing the two published windows.

Gap definition

Grass win rate minus pooled overall win rate.

The pooled overall rate includes grass matches.

Published windows

Source-career covers the available 2015-2025 corpus, not lifetime career.

Recent starts 2023-01-01 and overlaps the source corpus.

Row comparison

Change equals recent gap minus corpus gap.

44 qualified players; exact match counts are unavailable.

These recorded differences do not establish a change in skill or its cause.

View clay versus hard-court gap

Published measurements

Choose a measurement

MeasurementPopulationOrder

44 matching rows; 44 contain recent minus corpus.

CSV includes 44 matching rows, all fields, and source context; missing values stay blank.

Measured rows: 44 / 440 unavailable
Median: 0.97 ppMiddle ranked value
Middle 50%: -1.27 pp to 3.79 pp25th to 75th percentile
Observed range: -15.13 pp to 12.62 ppMinimum to maximum

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

Measurement availability3 / 3 fields have values

Reference population: All published groups. 44 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.

-15.13 ppRecent minus corpus12.62 pp

Showing 16 of 44 matching numeric rows. Open a row to inspect all its fields. Rankings apply only to the published subset.

01 / Interpretation

What this measures

Positive values mean the source-rounded recent gap is larger than the source-rounded career gap; negative values mean it is smaller.

02 / Calculation

displayed shift (pp) = 100 * (recent_gap - career_gap), where each source-rounded grass gap is grass win rate - overall win rate; stored values remain unscaled fractions

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

44 ATP players with both published gap windows independently at or above the declared source floor; source career is available 2015-2025 and recent is on or after 2023-01-01.

Recent matches overlap the available 2015-2025 career corpus. The shared source as-of is the claim-computation timestamp, not each player's latest match date. Exact match counts and unrounded operands are not published; differences use source-rounded operands. Opponent strength, age, draws, retirement endings, and tournament mix are uncontrolled. This is a descriptive historical comparison and makes no causal, skill, predictive, or market claim.

04 / Source & method references

Published source JSON Published tennis surface context method

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