Win probability

Thursday, 13 August 2026

20 matches selected · 4 tournaments · model last ran 19:50 UTC

Umpiry rates 20 matches on Thursday, 13 August 2026. The closest is Elena Gabriela Ruse v Magda Linette at 51 % — the model’s most uncertain call of the day. The most one-sided is Jack Draper v Martin Landaluce at 80 %. 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
17:55Cincinnati
WTA · hard
R128Gabriela Ruse E.Linette M.51 %49 %Toss-up1–0
17:45Cincinnati
ATP · hard
R128Norrie C.Prizmic D.52 %48 %Toss-up1–0
00:20Toronto
WTA · hard
SFSwiatek I.Svitolina E.52 %48 %Toss-up5–3
15:10Cincinnati
WTA · hard
R128Kasatkina D.Sonmez Z.52 %48 %Toss-up1–1
15:10Cincinnati
WTA · hard
R128Kalinina A.Vidmanova D.53 %47 %Toss-up1–0
17:45Cincinnati
WTA · hard
R128Frech M.Ruzic A.54 %46 %Toss-up1–0
00:40Montreal
ATP · hard
SFShelton B.Tien L.56 %44 %Toss-up1–2
15:10Cincinnati
WTA · hard
R128Birrell K.Rakhimova K.57 %43 %Toss-up3–3
15:10Cincinnati
WTA · hard
R128Townsend T.Osorio C.57 %43 %Toss-up2–0
19:30Cincinnati
WTA · hard
R128Yastremska D.Maria T.57 %43 %Toss-up0–3
15:10Cincinnati
WTA · hard
R128Marcinko P.Waltert S.58 %42 %Toss-up1–6
20:50Cincinnati
WTA · hard
R128Bucsa C.Udvardy P.58 %42 %Slight edge1–0
19:15Cincinnati
WTA · hard
R128Parry D.Dolehide C.59 %41 %Slight edge1–0
02:55Toronto
WTA · hard
SFRybakina E.Gauff C.60 %40 %Slight edge1–1
19:35Cincinnati
ATP · hard
R128Lennard Struff J.Burruchaga R.61 %39 %Slight edge2–0
22:10Montreal
ATP · hard
SFJodar R.Nakashima B.61 %39 %Slight edge0–1
18:00Cincinnati
WTA · hard
R128Townsend T.Camila Osorio Serrano M.61 %39 %Slight edge1–0
21:00Cincinnati
ATP · hard
R128Collignon R.Navone M.64 %36 %Slight edge0–2
20:25Cincinnati
ATP · hard
R128Kecmanovic M.Ugo Carabelli C.66 %34 %Slight edge2–0
15:10Cincinnati
ATP · hard
R128Draper J.Landaluce M.80 %20 %Strong favourite0–1

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

Wednesday, 12 August 2026 · 8 matches

Favourites won

6 / 8

Model expected

4.7

The model expected 4.7 favourites to win; 6 did. See yesterday’s page.

Biggest shock, last 7 days

12 Aug
W75 Kursumlijska Banja 2
ITF · clay
R32

Surprise score

91

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.