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

Victoria Azarenka

WTA278d inactive

Glicko-21.980

#56 overall·RD 82

Recent Form

40% Win Rate

Hard

Glicko-21.954#60

Clay

Glicko-21.958#94

Grass

Glicko-21.770#22

Recent Matches

Jessica Pegula

U.S. Open - New York

2025-08-29Hard6-1 7-5

Anastasia Pavlyuchenkova

U.S. Open - New York

2025-08-27Hard6-3 6-3

Hina Inoue

U.S. Open - New York

2025-08-24Hard7-6(0) 6-4

Anastasia Zakharova

Wimbledon - London

2025-07-01Grass6-2 2-6 6-1

Iga Swiatek

Bad Homburg Open - Bad Homburg

2025-06-24Grass6-4 6-4

Laura Siegemund

Bad Homburg Open - Bad Homburg

2025-06-23Grass6-2 6-2

Veronika Kudermetova

Bad Homburg Open - Bad Homburg

2025-06-22Grass6-7(4) 6-3 6-4

Caty McNally

Bad Homburg Open - Bad Homburg

2025-06-21Grass4-6 6-2 6-0

Sofia Kenin

French Open - Paris

2025-05-29Clay7-6(5) 6-4

Yanina Wickmayer

French Open - Paris

2025-05-27Clay6-0 6-0

Magdalena Frech

Internazionali BNL d'Italia - Rome

2025-05-09Clay7-5 6-4

Maria Camila Osorio Serrano

Internazionali BNL d'Italia - Rome

2025-05-07Clay6-2 6-3

Olga Danilovic

Mutua Madrid Open - Madrid

2025-04-23Clay6-4 6-2

Karolina Muchova

Miami Open - Miami

2025-03-21Hard6-0 ret.

Anhelina Kalinina

Miami Open - Miami

2025-03-19Hard6-3 6-1

Qinwen Zheng

BNP Paribas Open - Indian Wells

2025-03-07Hard6-3 6-4

Clervie Ngounoue

BNP Paribas Open - Indian Wells

2025-03-05Hard6-4 7-6(7)

Iga Swiatek

Dubai Duty Free Championships - Dubai

2025-02-18Hard6-0 6-2

Anhelina Kalinina

Dubai Duty Free Championships - Dubai

2025-02-17Hard2-6 7-6(4) 6-4

Amanda Anisimova

Qatar TotalEnergies Open - Doha

2025-02-09Hard6-3 7-5

Lucia Bronzetti

Australian Open - Melbourne

2025-01-13Hard6-2 7-6(2)

Marie Bouzkova

Brisbane International - Brisbane

2025-01-02Hard6-4 6-4

Maya Joint

Brisbane International - Brisbane

2025-01-01Hard6-7(5) 6-2 6-4

Kamilla Rakhimova

Guadalajara Open Akron - Guadalajara

2024-09-11Hard6-2 3-0 ret.

Yafan Wang

U.S. Open - New York

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

Clara Burel

U.S. Open - New York

2024-08-28Hard6-1 6-4

Yuliia Starodubtseva

U.S. Open - New York

2024-08-26Hard3-6 6-1 6-1

Peyton Stearns

National Bank Open - Toronto

2024-08-09Hard6-4 4-2 ret.

Greetje Minnen

National Bank Open - Toronto

2024-08-08Hard3-6 7-5 6-1

Anastasia Pavlyuchenkova

National Bank Open - Toronto

2024-08-06Hard6-2 6-2

Aryna Sabalenka

Mubadala Citi DC Open - Washington

2024-08-02Hard6-4 6-4

Yafan Wang

Mubadala Citi DC Open - Washington

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

Hailey Baptiste

Mubadala Citi DC Open - Washington

2024-07-30Hard7-6(6) 7-6(3)

Anna Kalinskaya

Berlin Ladies Open - Berlin

2024-06-22Grass6-1 6-7(3) 6-1

Elena Rybakina

Berlin Ladies Open - Berlin

2024-06-21Grass3-1 ret.

Zeynep Sonmez

Berlin Ladies Open - Berlin

2024-06-19Grass6-3 6-3

Maria Sakkari

Berlin Ladies Open - Berlin

2024-06-18Grass6-4 6-2

Mirra Andreeva

French Open - Paris

2024-05-30Clay6-3 3-6 7-5

Nadia Podoroska

French Open - Paris

2024-05-28Clay6-1 6-0

Danielle Rose Collins

Internazionali BNL d'Italia - Rome

2024-05-15Clay6-4 6-3

Maria Sakkari

Internazionali BNL d'Italia - Rome

2024-05-13Clay6-4 6-1

Mayar Sherif

Internazionali BNL d'Italia - Rome

2024-05-12Clay6-2 6-7(6) 6-3

Magda Linette

Internazionali BNL d'Italia - Rome

2024-05-10Clay6-7(5) 6-4 6-3

Sara Sorribes Tormo

Mutua Madrid Open - Madrid

2024-04-27Clay7-6(0) 6-3

Tatjana Maria

Mutua Madrid Open - Madrid

2024-04-25Clay6-3 6-1

Jessica Pegula

Credit One Charleston Open - Charleston

2024-04-05Clay6-4 3-6 7-6(7)

Taylor Townsend

Credit One Charleston Open - Charleston

2024-04-04Clay6-7(5) 6-3 6-4

Elisabetta Cocciaretto

Credit One Charleston Open - Charleston

2024-04-03Clay6-1 6-2

Elena Rybakina

Miami Open - Miami

2024-03-28Hard6-4 0-6 7-6(2)

Yulia Putintseva

Miami Open - Miami

2024-03-26Hard7-6(4) 1-6 6-3

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