# How far back does it go, and what survives at that depth?

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The span of the historical record, and — separately — which fields survive at each depth. Results, serve statistics and point sequences do not reach equally far back.

## Why it separates providers

A backtest is bounded by the shallowest field it needs, not by the deepest year on the marketing page. The free open datasets this field long relied on are no longer available.

## The test you can run

Ask for a match from each decade and diff the fields you get back. Find the year each field you depend on actually starts, rather than trusting a single span.

## What Live Tennis API measures

**Measured: 97,901** (as of September 1, 2026, 2013 to 2022 only)
- Caveat: Coverage of play in those years is 19.3% overall and 44.9% of tour-level — both numbers or neither. ITF and futures are effectively absent. Matches from 1968 to 2012 hold a result and no point sequence.
- Method: https://besttennisapi.com/methodology#historical