Win probability

Friday, 26 June 2026

11 matches selected · 6 tournaments · model last ran 19:50 UTC

Umpiry rates 11 matches on Friday, 26 June 2026. The closest is Sumit Nagal v Cezar Cretu at 52 % — the model’s most uncertain call of the day. The most one-sided is Madison Keys v Petra Marcinko at 78 %. 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
13:10Targu Mures
CHALLENGER · clay
SFNagal S.Cretu C.52 %48 %Toss-up2–0
20:10Piracicaba
CHALLENGER · clay
QFLa Serna J.Hardt N.55 %45 %Toss-up1–0
16:00Eastbourne
ATP · grass
SFHumbert U.Draper J.56 %44 %Toss-up2–0
13:10Mallorca
ATP · grass
SFQuinn E.Borges N.56 %44 %Toss-up1–0
19:40Piracicaba
CHALLENGER · clay
QFAboian V.Villanueva G.58 %42 %Toss-up2–4
13:35Eastbourne
ATP · grass
SFBergs Z.Samuel T.62 %38 %Slight edge1–0
15:40Mallorca
ATP · grass
SFDavidovich Fokina A.Marozsan F.67 %33 %Clear favourite3–0
11:10Bad Homburg
WTA · grass
SFOsaka N.Wang X.75 %25 %Clear favourite1–0
13:10Bad Homburg
WTA · grass
SFMuchova K.Gabriela Ruse E.76 %24 %Clear favourite2–0
10:10Eastbourne
WTA · grass
SFOstapenko J.Maria T.76 %24 %Clear favourite0–3
12:20Eastbourne
WTA · grass
SFKeys M.Marcinko P.78 %22 %Clear favourite1–0

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

Thursday, 25 June 2026 · 20 matches

Favourites won

11 / 20

Model expected

13.9

The model expected 13.9 favourites to win; 11 did. See yesterday’s page.

Biggest shock, last 7 days

23 Jun
Eastbourne
ATP · grass
R32

Surprise score

88

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.