The models Changelog
What changed in each model and when. A version goes up only when a published number changes; work in testing runs alongside the live model without changing it.
October 2026
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Rematches graded
A match between two players who had met in the previous ten days was never graded. Both such matches from Oct 20 are now graded and count in the record.
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Home crowd edge in testing
A small lift for players at a tournament in their own country is now logged next to every WTA forecast. Published numbers do not change. It is read once a year, first in January 2028.
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WTA model V2
WTA forecasts now come from model V2, which replaces model V1. Each player's serve and return level now updates as her form changes through the season, each player gets her own projected games, and totals and margins cover a wider, more realistic range of scores. Model V1's record stays on the site, shown separately.