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

Yafan Wang

WTA216d inactive

Glicko-21.880

#140 overall·RD 79

Elo1.897#137 overall

Recent Form

40% Win Rate

Hard

Glicko-21.847#167

Elo1.752#164

Clay

Glicko-21.547#860

Elo1.639#379

Grass

Glicko-21.475#2326

Elo1.564#75

Recent Matches

Belinda Bencic

Hong Kong Tennis Open - Hong Kong

2025-10-30Hard6-2 6-2

Maddison Inglis

Hong Kong Tennis Open - Hong Kong

2025-10-27Hard6-4 6-7(6) 6-3

Lulu Sun

Guangzhou Open - Guangzhou

2025-10-23Hard6-3 6-1

Kamilla Rakhimova

Guangzhou Open - Guangzhou

2025-10-20Hard6-2 6-4

Janice Tjen

WTA 125 Jinan Open - Jinan

2025-10-14Hard6-4 6-7(4) 6-2

Katerina Siniakova

Wuhan Open - Wuhan

2025-10-05Hard6-3 7-5

Zeynep Sonmez

Wuhan Open - Wuhan

2025-10-04Hard6-4 4-6 6-4

Caty McNally

Korea Open - Seoul

2025-09-13Hard6-4 6-1

Emma Navarro

U.S. Open - New York

2025-08-24Hard7-6(9) 6-3

Liudmila Samsonova

Tennis in the Land - Cleveland

2025-08-20Hard6-2 6-4

Peyton Stearns

Tennis in the Land - Cleveland

2025-08-18Hard6-4 3-6 6-3

Nuria Parrizas-Diaz

Tennis in the Land - Cleveland

2025-08-17Hard1-6 6-0 6-4

Aleksandra Krunic

Tennis in the Land - Cleveland

2025-08-16Hard7-5 6-0

Peyton Stearns

Cincinnati Open - Cincinnati

2025-08-07Hard6-4 6-3

Yuliia Starodubtseva

Omnium Banque Nationale - Montreal

2025-07-28Hard6-7(6) 6-4 6-4

Rebeka Masarova

Omnium Banque Nationale - Montreal

2025-07-26Hard6-2 4-6 6-3

Daria Kasatkina

Australian Open - Melbourne

2025-01-16Hard6-2 6-0

Anna Bondar

Australian Open - Melbourne

2025-01-14Hard3-6 6-3 6-4

Anhelina Kalinina

Brisbane International - Brisbane

2024-12-30Hard6-4 2-0 ret.

Hailey Baptiste

Wuhan Open - Wuhan

2024-10-05Hard6-3 6-4

Ashlyn Krueger

China Open - Beijing

2024-09-26Hard3-6 6-4 6-2

Paula Badosa Gibert

U.S. Open - New York

2024-09-01Hard6-1 6-2

Victoria Azarenka

U.S. Open - New York

2024-08-30Hard6-4 3-6 6-1

Diane Parry

U.S. Open - New York

2024-08-28Hard6-0 6-4

Maria Sakkari

U.S. Open - New York

2024-08-26Hard6-2 ret.

Sara Sorribes Tormo

Tennis in the Land - Cleveland

2024-08-20Hard6-4 6-1

Elina Svitolina

Western & Southern Open - Cincinnati

2024-08-13Hard5-7 6-3 6-2

Erika Andreeva

Western & Southern Open - Cincinnati

2024-08-12Hard6-7(3) 6-3 6-3

Sara Errani

Western & Southern Open - Cincinnati

2024-08-11Hard6-3 6-0

Cori Gauff

National Bank Open - Toronto

2024-08-08Hard6-4 6-4

Sofia Kenin

National Bank Open - Toronto

2024-08-06Hard7-5 7-6(3)

Chloe Paquet

National Bank Open - Toronto

2024-08-05Hard6-3 7-5

Mirjam Bjorklund

National Bank Open - Toronto

2024-08-04Hard7-5 6-4

Victoria Azarenka

Mubadala Citi DC Open - Washington

2024-08-01Hard6-1 6-7(5) 6-3

Karolina Pliskova

Mubadala Citi DC Open - Washington

2024-07-29Hard5-7 6-3 6-0

Madison Keys

Wimbledon - London

2024-07-04Grass6-2 6-2

Anna Schmiedlova

Wimbledon - London

2024-07-01Grass6-0 3-6 6-4

Magda Linette

Rothesay International - Eastbourne

2024-06-22Grass6-3 6-3

Amelia Rajecki

Rothesay Classic - Birmingham

2024-06-15Grass7-6(5) 7-6(6)

Ashlyn Krueger

Rothesay Open - Nottingham

2024-06-11Grass6-3 6-3

Dayana Yastremska

French Open - Paris

2024-05-30Clay6-2 6-0

Maria Timofeeva

French Open - Paris

2024-05-26Clay6-3 6-3

Viktoriya Tomova

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2024-05-22Clay7-6(4) 6-0

Lin Zhu

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2024-05-21Clay4-6 6-0 6-2

Jesika Maleckova

Parma Ladies Open - Parma

2024-05-14Clay3-6 6-4 6-3

Katie Volynets

Internazionali BNL d'Italia - Rome

2024-05-09Clay7-6(6) 6-1

Peyton Stearns

Miami Open - Miami

2024-03-19Hard6-2 6-3

Diana Shnaider

Fifth Third Charleston - Charleston

2024-03-15Hard3-6 6-3 6-3

Erika Andreeva

Fifth Third Charleston - Charleston

2024-03-14Hard6-2 6-4

Sara Errani

Fifth Third Charleston - Charleston

2024-03-13Hard6-4 6-4

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