What is VOPO in tennis betting?

VOPO (Value Over Pinnacle Odds) is the difference between Tennis Glicko's internal win probability (average of Glicko-2 and Elo models) and the implied probability from Pinnacle's odds. A positive VOPO means the market is undervaluing a player.

What is Green EV in tennis betting?

Green EV is Tennis Glicko's high-conviction value signal. It triggers when VOPO exceeds 12% AND the internal win probability is above 50% — indicating the market is significantly mispricing a player.

How accurate is Tennis Glicko?

Tennis Glicko has 72.8% predictive accuracy over the last 30 days, with a Brier Score of 0.1775 — a standard probabilistic calibration metric used in forecasting.

Why use Glicko-2 instead of ATP rankings for tennis predictions?

ATP rankings are a lagging indicator — they ignore surface specialization, injury returns, scheduling fatigue, and form swings. Glicko-2 updates after every match, adjusts for opponent quality, and models rating uncertainty, making it significantly more accurate for predicting match outcomes.

Rankings

Aryna Sabalenka

WOMENHot

Age28

BirthplaceMinsk, Belarus

Height1.82m

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:63%

Fatigue:0/100

Inactive:19 Days

Overall

Glicko-22.351

#1RD 77

Elo2.428

Hard

Glicko-22.473

Elo2.428

Clay

Glicko-22.283

Elo2.073

Grass

Glicko-21.922

Elo1.809

Surface Record

HardClayGrass

202623-18-35-2

202538-717-37-2

202441-915-41-1

202335-914-36-2

202220-159-54-2

202125-1213-37-3

Recent Matches

Naomi OsakaWimbledon - London2026-07-05Grass6-2 7-6(2)

Jelena OstapenkoWimbledon - London2026-07-03Grass6-4 6-4

Mccartney KesslerWimbledon - London2026-07-01Grass6-1 7-6(9)

Teodora KostovicWimbledon - London2026-06-29Grass6-2 6-3

Jessica PegulaBerlin Tennis Open - Berlin2026-06-20Grass6-4 6-7(4) 6-0

Nikola BartunkovaBerlin Tennis Open - Berlin2026-06-19Grass2-6 7-6(2) 6-4

Ekaterina AlexandrovaBerlin Tennis Open - Berlin2026-06-17Grass6-4 6-4

Diana ShnaiderFrench Open - Paris2026-06-03Clay3-6 7-5 6-0

Naomi OsakaFrench Open - Paris2026-06-01Clay7-5 6-3

Daria KasatkinaFrench Open - Paris2026-05-30Clay6-0 7-5

Elsa JacquemotFrench Open - Paris2026-05-28Clay7-5 6-2

Jessica Bouzas ManeiroFrench Open - Paris2026-05-26Clay6-4 6-2

Sorana CirsteaInternazionali BNL d'Italia - Rome2026-05-09Clay2-6 6-3 7-5

Barbora KrejcikovaInternazionali BNL d'Italia - Rome2026-05-07Clay6-2 6-3

Hailey BaptisteMutua Madrid Open - Madrid2026-04-28Clay2-6 6-2 7-6(6)

Naomi OsakaMutua Madrid Open - Madrid2026-04-27Clay6-7(1) 6-3 6-2

Jaqueline CristianMutua Madrid Open - Madrid2026-04-25Clay6-1 6-4

Peyton StearnsMutua Madrid Open - Madrid2026-04-23Clay7-5 6-3

Cori GauffMiami Open - Miami2026-03-28Hard6-2 4-6 6-3

Elena RybakinaMiami Open - Miami2026-03-26Hard6-4 6-3

Hailey BaptisteMiami Open - Miami2026-03-25Hard6-4 6-4

Qinwen ZhengMiami Open - Miami2026-03-23Hard6-3 6-4

Caty McNallyMiami Open - Miami2026-03-22Hard6-4 6-2

Ann LiMiami Open - Miami2026-03-20Hard7-6(5) 6-4

Elena RybakinaBNP Paribas Open - Indian Wells2026-03-15Hard3-6 6-3 7-6(6)

Linda NoskovaBNP Paribas Open - Indian Wells2026-03-13Hard6-3 6-4

Victoria MbokoBNP Paribas Open - Indian Wells2026-03-12Hard7-6(0) 6-4

Naomi OsakaBNP Paribas Open - Indian Wells2026-03-10Hard6-2 6-4

Jaqueline CristianBNP Paribas Open - Indian Wells2026-03-08Hard6-4 6-1

Himeno SakatsumeBNP Paribas Open - Indian Wells2026-03-06Hard6-4 6-2

Elena RybakinaAustralian Open - Melbourne2026-01-31Hard6-4 4-6 6-4

Elina SvitolinaAustralian Open - Melbourne2026-01-29Hard6-2 6-3

Iva JovicAustralian Open - Melbourne2026-01-27Hard6-3 6-0

Victoria MbokoAustralian Open - Melbourne2026-01-25Hard6-1 7-6(1)

Anastasia PotapovaAustralian Open - Melbourne2026-01-23Hard7-6(4) 7-6(7)

Zhuoxuan BaiAustralian Open - Melbourne2026-01-21Hard6-3 6-1

Tiantsoa Rakotomanga RajaonahAustralian Open - Melbourne2026-01-18Hard6-4 6-1

Marta KostyukBrisbane International - Brisbane2026-01-11Hard6-4 6-3

Karolina MuchovaBrisbane International - Brisbane2026-01-10Hard6-3 6-4

Madison KeysBrisbane International - Brisbane2026-01-09Hard6-3 6-3

Sorana CirsteaBrisbane International - Brisbane2026-01-08Hard6-3 6-3

Cristina BucsaBrisbane International - Brisbane2026-01-06Hard6-0 6-1

Elena RybakinaWTA Finals - Riyadh2025-11-08I.Hard6-3 7-6(0)

Amanda AnisimovaWTA Finals - Riyadh2025-11-07I.Hard6-3 3-6 6-3

Cori GauffWTA Finals - Riyadh2025-11-06I.Hard7-6(5) 6-2

Jessica PegulaWTA Finals - Riyadh2025-11-04I.Hard6-4 2-6 6-3

Jasmine PaoliniWTA Finals - Riyadh2025-11-02I.Hard6-3 6-1

Jessica PegulaWuhan Open - Wuhan2025-10-11Hard2-6 6-4 7-6(2)

Elena RybakinaWuhan Open - Wuhan2025-10-10Hard6-3 6-3

Liudmila SamsonovaWuhan Open - Wuhan2025-10-09Hard6-3 6-2

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