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

Jelena Ostapenko

WTA7d inactive

Glicko-22.020

#32 overall·RD 69

Elo2.079#28 overall

Recent Form

60% Win Rate

Hard

Glicko-21.952#62

Elo1.882#51

Clay

Glicko-22.145#19

Elo1.844#43

Grass

Glicko-21.670#53

Elo1.674#15

Recent Matches

Magda Linette

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2026-05-27Clay6-2 2-6 6-2

Ella Seidel

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2026-05-25Clay6-4 6-4

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Anna Kalinskaya

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Qinwen Zheng

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Lucrezia Stefanini

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Anastasia Potapova

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Simona Waltert

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Mirra Andreeva

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Alexandra Eala

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Victoria Mboko

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Rebecca Sramkova

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Tereza Valentova

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Sorana Cirstea

Brisbane International - Brisbane

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Sorana Cirstea

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Marina Stakusic

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Taylor Townsend

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Xiyu Wang

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Lucia Bronzetti

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Naomi Osaka

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Renata Zarazua

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Sonay Kartal

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Alexandra Eala

Rothesay International - Eastbourne

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Sonay Kartal

Rothesay International - Eastbourne

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Elena Rybakina

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Caroline Dolehide

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Rebecca Sramkova

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Anastasija Sevastova

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Aryna Sabalenka

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Emma Navarro

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