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

Sara Sorribes Tormo

WTA1d inactive

Glicko-21.865

#154 overall·RD 72

Elo1.860#178 overall

Recent Form

60% Win Rate

Hard

Glicko-21.636#641

Elo1.678#301

Clay

Glicko-21.960#90

Elo1.769#117

Grass

Glicko-21.500#183

Elo1.464#1937

Recent Matches

Victoria Jimenez Kasintseva

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Daria Kasatkina

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Elena Pridankina

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Ajla Tomljanovic

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2026-04-28Clay6-4 2-6 6-3

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Leyre Romero Gormaz

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Tyra Caterina Grant

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Jennifer Ruggeri

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Yue Yuan

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Alicia Herrero Linana

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Laura Samson

LP Open by IND - Colina

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Gabriela Ce

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Laura Pigossi

Billie Jean King Cup, Qualifiers, Group B

2025-04-11I.Hard6-3 7-5

Selena Janicijevic

Copa Colsanitas - Bogota

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Heather Watson

Puerto Vallarta Open - Puerto Vallarta

2025-03-27Hard3-6 6-4 6-2

Oksana Kalashnikova

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2025-03-25Hard6-3 6-1

Claire Liu

Miami Open - Miami

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Lilli Tagger

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Anna Blinkova

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Aliaksandra Sasnovich

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2025-02-02I.Hard6-4 7-5

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Lulu Sun

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2025-01-28I.Hard6-3 6-3

Suzan Lamens

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2025-01-27I.Hard6-2 0-6 6-3

Tamara Korpatsch

Upper Austria Ladies Linz - Linz

2025-01-26I.Hard6-4 7-5

Maddison Inglis

Australian Open - Melbourne

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Jaimee Fourlis

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Sara Bejlek

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2024-12-28Hard6-7(6) 6-2 1-0 ret.

Tahlia Kokkinis

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