Win probability

Monday, 20 July 2026

7 matches selected · 6 tournaments · model last ran 17:50 UTC

Umpiry rates 7 matches on Monday, 20 July 2026. The closest is Inaki Montes De La Torre v Hynek Barton at 51 % — the model’s most uncertain call of the day. 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
14:10Tampere
CHALLENGER · clay
R32Montes De La Torre I.Barton H.51 %49 %Toss-up2–1
12:40Estoril
ATP · clay
R32Ugo Carabelli C.Droguet T.52 %48 %Toss-up0–1
18:10Palermo
CHALLENGER · clay
R32Urgesi F.Yaneva E.54 %46 %Toss-up1–0
09:10Livesport Prague Open
WTA · hard
R32Oktiabreva A.Dodin O.56 %44 %Toss-up0–1
12:40Hamburg
WTA · clay
R32Kalinina A.Quevedo K.57 %43 %Toss-up1–0
12:10Tampere
CHALLENGER · clay
R32Elahi Galan D.Arnaud Bailly G.57 %43 %Toss-up0–1
08:10Iasi
WTA · clay
FBadosa P.Sherif M.64 %36 %Slight edge1–3

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

Sunday, 19 July 2026 · 7 matches

Favourites won

4 / 7

Model expected

4.0

The model expected 4.0 favourites to win; 4 did. See yesterday’s page.

Biggest shock, last 7 days

19 Jul
Winnipeg
CHALLENGER · hard
SF

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.