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

Tatjana Maria

WTA9d inactive

Glicko-21.789

#268 overall·RD 73

Elo1.781#296 overall

Recent Form

40% Win Rate

Hard

Glicko-21.695#473

Elo1.606#535

Clay

Glicko-21.818#239

Elo1.591#525

Grass

Glicko-21.750#25

Elo1.631#31

Recent Matches

Elise Mertens

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2026-05-25Clay7-5 6-0

Yasmine Kabbaj

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-20Clay6-2 6-4

Diae El Jardi

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2026-05-19Clay6-2 6-4

Sorana Cirstea

Internazionali BNL d'Italia - Rome

2026-05-07Clay6-2 6-0

Magda Linette

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2026-05-06Clay6-0 6-3

Laura Samson

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2026-04-21Clay6-4 6-2

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Open Capfinances Rouen Metropole - Rouen

2026-04-18Clay6-3 6-0

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Dominika Salkova

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Valentina Mediorreal Arias

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Venus Williams

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Marie Bouzkova

China Open - Beijing

2025-09-24Hard6-2 6-4

Suzan Lamens

Korea Open - Seoul

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Guadalajara Open Akron - Guadalajara

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Rebecca Marino

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Zeynep Sonmez

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2025-09-09Hard6-4 6-2

Maria Sakkari

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Anna Bondar

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2025-08-18Hard7-6(5) 7-5

Marta Kostyuk

Cincinnati Open - Cincinnati

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Whitney Osuigwe

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Omnium Banque Nationale - Montreal

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Mubadala Citi DC Open - Washington

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Caty McNally

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Carol Zhao

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Sayaka Ishii

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2025-07-11Grass6-3 6-1

Yuriko Miyazaki

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Kayla Cross

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