Win probability

Wednesday, 8 July 2026

5 matches selected · 3 tournaments · model last ran 16:50 UTC

Umpiry rates 5 matches on Wednesday, 8 July 2026. The closest is August Holmgren v Tristan Schoolkate at 56 % — the model’s most uncertain call of the day. The most one-sided is Flavio Cobolli v Arthur Fery at 81 %. Probabilities come from a per-tour model trained on Elo, surface Elo, recent serve and return form and layoff.

Rated matches · ordered closest first
TimeTournamentRoundMatchProbabilityVerdictH2H
17:45Newport
CHALLENGER · grass
R32Holmgren A.Schoolkate T.56 %44 %Toss-up0–1
12:35Wimbledon
WTA · grass
QFKostyuk M.Paolini J.68 %32 %Clear favourite3–2
12:05Wimbledon
WTA · grass
QFNoskova L.Mertens E.73 %27 %Clear favourite1–0
14:30Wimbledon
ATP · grass
QFZverev A.Fritz T.74 %26 %Clear favourite6–10
14:15Wimbledon
ATP · grass
QFCobolli F.Fery A.81 %19 %Strong favourite0–2

How to read this

Each row gives the model’s probability that the favourite wins, and the verdict says the same thing in words. Rows are ordered by how close the model thinks the match is, so the top of the table is where it is least sure. A 70 % favourite losing is not a broken model — it is the 30 %. Probabilities are not odds and take no account of any market.

How often the model has been right

Umpiry win-probability model accuracy by tour family, measured on the predictions the model made
TourCorrect
ATP / WTA66 %
Challenger (men)64 %
Challenger (women)68 %
ITF (men)66 %
ITF (women)64 %

Measured on the predictions the model actually made, not on a backtest — see Methodology.

Yesterday

Tuesday, 7 July 2026 · 6 matches

Favourites won

4 / 6

Model expected

4.3

The model expected 4.3 favourites to win; 4 did. See yesterday’s page.

Biggest shock, last 7 days

3 Jul
Wimbledon
ATP · grass
R32

Surprise score

95

Questions

How is the probability calculated?
A separate model for each tour, trained on Elo, surface-specific Elo, recent serve and return form and time since the player’s last match. It runs several times a day; the time of the last run is at the top of this page.
How often is the model right?
We publish it. The table above gives the hit rate for each tour family, measured on the predictions the model actually made — see Methodology for how it is computed.
Why are the closest matches at the top?
Rows are ordered by distance from 50 %, so the table opens where the model is least sure. “Most one-sided” reverses the order and groups the rows by tournament.
Is this a betting tip?
No. The page shows a model’s probability and how often that model has been right. There are no odds, no comparison with a market and no suggested stake.