Win probability

Wednesday, 22 July 2026

17 matches selected · 7 tournaments · model last ran 16:50 UTC

Umpiry rates 17 matches on Wednesday, 22 July 2026. The closest is Sebastian Baez v Arthur Rinderknech at 50 % — 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
09:10Kitzbuhel
ATP · clay
R16Baez S.Rinderknech A.50 %50 %Toss-up1–0
10:00Segovia
CHALLENGER · hard
R16Santillan A.Alkaya M.51 %49 %Toss-up0–1
16:00Winnipeg
CHALLENGER · hard
R16Rottgering M.Hsiou Hsu Y.52 %48 %Toss-up0–1
14:50Hamburg
WTA · clay
R16Korpatsch T.Stusek J.52 %48 %Toss-up1–0
11:10Hamburg
WTA · clay
R32Johanna Brockmann T.Jacquemot E.52 %48 %Toss-up0–1
13:40Estoril
ATP · clay
R16Borges N.Burruchaga R.53 %47 %Toss-up0–1
17:10Palermo
CHALLENGER · clay
R16Kabbaj Y.Gorgodze E.54 %46 %Toss-up2–2
14:45Livesport Prague Open
WTA · hard
R16Salkova D.Dodin O.54 %46 %Toss-up1–0
10:45Kitzbuhel
ATP · clay
R16Navone M.Lennard Struff J.54 %46 %Toss-up2–0
17:10Hamburg
WTA · clay
R16Bondar A.Noha Akugue N.58 %42 %Toss-up3–0
14:10Kitzbuhel
ATP · clay
R16Molcan A.Altmaier D.59 %41 %Slight edge3–0
12:35Livesport Prague Open
WTA · hard
R16Valentova T.Joint M.62 %38 %Slight edge2–0
10:25Livesport Prague Open
WTA · hard
R16Bouzkova M.Young Suh Lee C.62 %38 %Slight edge1–0
09:10Kitzbuhel
ATP · clay
R16Vacherot V.Halys Q.64 %36 %Slight edge0–1
11:10Estoril
ATP · clay
R16Droguet T.Gaston H.64 %36 %Slight edge0–3
11:55Kitzbuhel
ATP · clay
R16Buse I.Feldbausch K.65 %35 %Slight edge2–0
14:20Kitzbuhel
ATP · clay
R16Bublik A.Diaz Acosta F.66 %34 %Slight edge1–0

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

Tuesday, 21 July 2026 · 11 matches

Favourites won

6 / 11

Model expected

6.1

The model expected 6.1 favourites to win; 6 did. See yesterday’s page.

Biggest shock, last 7 days

21 Jul
Segovia
CHALLENGER · hard
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.