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

Naomi Osaka

WTA2d inactive49 Low Fatigue

Glicko-22.152

#13 overall·RD 77

Elo2.261#11 overall

Recent Form

60% Win Rate

Hard

Glicko-22.107#13

Elo2.038#12

Clay

Glicko-22.239#9

Elo1.877#28

Grass

Glicko-21.662#56

Elo1.559#83

Recent Matches

Aryna Sabalenka

French Open - Paris

2026-06-01Clay7-5 6-3

Iva Jovic

French Open - Paris

2026-05-30Clay7-6(5) 6-7(3) 6-4

Donna Vekic

French Open - Paris

2026-05-28Clay7-6(1) 6-4

Laura Siegemund

French Open - Paris

2026-05-26Clay6-3 7-6(3)

Iga Swiatek

Internazionali BNL d'Italia - Rome

2026-05-11Clay6-2 6-1

Diana Shnaider

Internazionali BNL d'Italia - Rome

2026-05-10Clay6-1 6-2

Eva Lys

Internazionali BNL d'Italia - Rome

2026-05-08Clay6-4 4-6 6-3

Aryna Sabalenka

Mutua Madrid Open - Madrid

2026-04-27Clay6-7(1) 6-3 6-2

Anhelina Kalinina

Mutua Madrid Open - Madrid

2026-04-25Clay6-1 6-3

Maria Camila Osorio Serrano

Mutua Madrid Open - Madrid

2026-04-23Clay6-2 7-5

Talia Gibson

Miami Open - Miami

2026-03-21Hard7-5 6-4

Aryna Sabalenka

BNP Paribas Open - Indian Wells

2026-03-10Hard6-2 6-4

Maria Camila Osorio Serrano

BNP Paribas Open - Indian Wells

2026-03-08Hard6-1 3-6 6-1

Victoria Jimenez Kasintseva

BNP Paribas Open - Indian Wells

2026-03-06Hard7-5 6-2

Sorana Cirstea

Australian Open - Melbourne

2026-01-22Hard6-3 4-6 6-2

Antonia Ruzic

Australian Open - Melbourne

2026-01-20Hard6-3 3-6 6-4

Katie Swan

United Cup - Australia

2026-01-04Hard7-6(4) 6-1

Maria Sakkari

United Cup - Australia

2026-01-02Hard6-4 6-2

Suzan Lamens

Japan Open - Osaka

2025-10-15Hard7-6(6) 3-6 6-2

Wakana Sonobe

Japan Open - Osaka

2025-10-13Hard6-0 6-4

Linda Noskova

Wuhan Open - Wuhan

2025-10-08Hard7-6(2) 6-3

Leylah Annie Fernandez

Wuhan Open - Wuhan

2025-10-07Hard4-6 7-5 6-3

Aliaksandra Sasnovich

China Open - Beijing

2025-09-27Hard1-6 6-4 6-2

Amanda Anisimova

U.S. Open - New York

2025-09-04Hard6-7(4) 7-6(3) 6-3

Karolina Muchova

U.S. Open - New York

2025-09-03Hard6-4 7-6(3)

Cori Gauff

U.S. Open - New York

2025-09-01Hard6-3 6-2

Daria Kasatkina

U.S. Open - New York

2025-08-30Hard6-0 4-6 6-3

Hailey Baptiste

U.S. Open - New York

2025-08-28Hard6-3 6-1

Greetje Minnen

U.S. Open - New York

2025-08-26Hard6-3 6-4

Victoria Mboko