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

Ann Li

WTA6d inactive

Glicko-21.992

#48 overall·RD 66

Elo2.023#55 overall

Recent Form

60% Win Rate

Hard

Glicko-21.951#63

Elo1.843#71

Clay

Glicko-22.028#49

Elo1.783#97

Grass

Glicko-21.478#2325

Elo1.456#1958

Recent Matches

Diane Parry

French Open - Paris

2026-05-28Clay6-3 6-4

Shuai Zhang

French Open - Paris

2026-05-26Clay6-4 6-2

Emma Navarro

Internationaux de Strasbourg - Strasbourg

2026-05-22Clay6-1 6-3

Marie Bouzkova

Internationaux de Strasbourg - Strasbourg

2026-05-21Clay6-3 7-5

Ekaterina Alexandrova

Internationaux de Strasbourg - Strasbourg

2026-05-19Clay4-6 6-4 6-3

Maya Joint

Internationaux de Strasbourg - Strasbourg

2026-05-17Clay6-1 6-2

Liudmila Samsonova

Internazionali BNL d'Italia - Rome

2026-05-08Clay6-4 6-3

Shuai Zhang

Internazionali BNL d'Italia - Rome

2026-05-05Clay1-6 6-4 6-2

Leylah Annie Fernandez

Mutua Madrid Open - Madrid

2026-04-27Clay6-3 6-2

Iga Swiatek

Mutua Madrid Open - Madrid

2026-04-25Clay7-6(4) 2-6 3-0 ret.

Alycia Parks

Mutua Madrid Open - Madrid

2026-04-23Clay6-2 6-7(5) 6-3

Marta Kostyuk

Open Capfinances Rouen Metropole - Rouen

2026-04-17Clay6-0 6-7(4) 6-3

Kamilla Rakhimova

Open Capfinances Rouen Metropole - Rouen

2026-04-15Clay4-6 6-2 6-3

Daria Kasatkina

Open Capfinances Rouen Metropole - Rouen

2026-04-13Clay6-7(6) 6-2 6-4

Dayana Yastremska

Upper Austria Ladies Linz - Linz

2026-04-07Clay7-5 4-6 6-3

Aryna Sabalenka

Miami Open - Miami

2026-03-20Hard7-6(5) 6-4

Kimberly Birrell

Miami Open - Miami

2026-03-19Hard6-2 2-6 6-3

Talia Gibson

BNP Paribas Open - Indian Wells

2026-03-04Hard6-3 7-5

Zeynep Sonmez

Merida Open Akron - Merida

2026-02-26Hard3-6 7-6(7) 6-4

Linda Noskova

Dubai Duty Free Championships - Dubai

2026-02-15Hard6-3 5-7 6-4

Elisabetta Cocciaretto

Qatar TotalEnergies Open - Doha

2026-02-11Hard7-6(5) 5-7 6-4

Magdalena Frech

Qatar TotalEnergies Open - Doha

2026-02-10Hard6-3 6-4

Leylah Annie Fernandez

Qatar TotalEnergies Open - Doha

2026-02-08Hard6-4 6-3

Magda Linette

Australian Open - Melbourne

2026-01-21Hard6-3 6-3

Maria Camila Osorio Serrano

Australian Open - Melbourne

2026-01-19Hard6-4 6-7(5) 7-5

Elisabetta Cocciaretto

Hobart International - Hobart

2026-01-14Hard1-6 7-5 7-5

Katie Volynets

Hobart International - Hobart

2026-01-12Hard4-6 7-5 6-2

Olivia Gadecki

Brisbane International - Brisbane

2026-01-05Hard6-4 6-4

Zhuoxuan Bai

Jiangxi Open - Jiujiang

2025-10-28Hard6-3 6-1

Lulu Sun

Guangzhou Open - Guangzhou

2025-10-26Hard7-6(6) 6-2

Shuai Zhang

Guangzhou Open - Guangzhou

2025-10-25Hard5-2 ret.

Elisabetta Cocciaretto

Guangzhou Open - Guangzhou

2025-10-24Hard6-3 6-4

Maria Camila Osorio Serrano

Guangzhou Open - Guangzhou

2025-10-23Hard7-5 6-2

Victoria Jimenez Kasintseva

Guangzhou Open - Guangzhou

2025-10-21Hard6-4 7-6(4)

Rebecca Sramkova

Japan Open - Osaka

2025-10-16Hard6-2 3-6 6-3

Varvara Gracheva

Japan Open - Osaka

2025-10-14Hard6-4 6-0

Ekaterina Alexandrova

Wuhan Open - Wuhan

2025-10-08Hard7-6(5) 6-2

Emma Raducanu

Wuhan Open - Wuhan

2025-10-07Hard6-1 4-1 ret.

Maria Camila Osorio Serrano

China Open - Beijing

2025-09-25Hard7-5 6-7(5) 7-5

Jessica Pegula

U.S. Open - New York

2025-08-31Hard6-1 6-2

Priscilla Hon

U.S. Open - New York

2025-08-29Hard7-5 6-3

Belinda Bencic

U.S. Open - New York

2025-08-27Hard6-3 6-3

Rebecca Sramkova

U.S. Open - New York

2025-08-25Hard4-6 6-2 6-4

Sorana Cirstea