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

Katie Boulter

WTA6d inactive

Glicko-21.994

#47 overall·RD 69

Elo2.020#58 overall

Recent Form

40% Win Rate

Hard

Glicko-21.988#45

Elo1.883#49

Clay

Glicko-21.902#140

Elo1.702#207

Grass

Glicko-21.766#24

Elo1.658#21

Recent Matches

Anastasia Potapova

French Open - Paris

2026-05-28Clay5-7 6-4 6-2

Akasha Urhobo

French Open - Paris

2026-05-25Clay6-4 4-6 6-4

Anastasia Zakharova

Trophee Clarins - Paris

2026-05-13Clay6-3 3-6 6-4

Kimberly Birrell

Trophee Clarins - Paris

2026-05-12Clay7-5 7-6(2)

Eva Lys

Internazionali BNL d'Italia - Rome

2026-05-06Clay6-4 3-6 6-4

Jessica Pegula

Mutua Madrid Open - Madrid

2026-04-24Clay6-4 6-4

Taylor Townsend

Mutua Madrid Open - Madrid

2026-04-22Clay6-4 6-2

Veronika Podrez

Open Capfinances Rouen Metropole - Rouen

2026-04-17Clay6-4 6-1

Jaqueline Cristian

Open Capfinances Rouen Metropole - Rouen

2026-04-15Clay7-6(5) 4-6 6-1

Maria Timofeeva

Open Capfinances Rouen Metropole - Rouen

2026-04-13Clay6-2 6-2

Elena Gabriela Ruse

Upper Austria Ladies Linz - Linz

2026-04-06Clay7-6(3) 7-6(2)

Karolina Muchova

Miami Open - Miami

2026-03-21Hard6-3 7-5

Clara Tauson

Miami Open - Miami

2026-03-20Hard6-7(4) 6-4 1-0 ret.

Jessica Bouzas Maneiro

Miami Open - Miami

2026-03-17Hard7-6(9) 6-4

Victoria Jimenez Kasintseva

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2026-03-03Hard2-6 7-5 6-2

Viktoriya Tomova

BNP Paribas Open - Indian Wells

2026-03-02Hard6-4 6-3

Jasmine Paolini

Merida Open Akron - Merida

2026-02-27Hard0-6 6-3 6-3

Maria Camila Osorio Serrano

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Beatriz Haddad Maia

Merida Open Akron - Merida

2026-02-23Hard6-4 6-4

Tamara Korpatsch

Ostrava Open - Ostrava

2026-02-07I.Hard5-7 6-2 6-1

Katie Volynets

Ostrava Open - Ostrava

2026-02-06I.Hard6-1 6-3

Linda Fruhvirtova

Ostrava Open - Ostrava

2026-02-05I.Hard6-3 6-2

Viktorija Golubic

Ostrava Open - Ostrava

2026-02-04I.Hard6-2 6-2

Lucie Havlickova

Ostrava Open - Ostrava

2026-02-03I.Hard6-4 3-6 6-1

Belinda Bencic

Australian Open - Melbourne

2026-01-20Hard6-0 7-5

Elina Svitolina

ASB Classic - Auckland

2026-01-08Hard7-5 6-4

Yuliia Starodubtseva

ASB Classic - Auckland

2026-01-06Hard6-3 6-3

Alexandra Eala

Hong Kong Tennis Open - Hong Kong

2025-10-28Hard6-4 2-1 ret.

Eva Lys

Toray Pan Pacific Open - Tokyo

2025-10-20Hard6-2 6-1

Kimberly Birrell

Toray Pan Pacific Open - Tokyo

2025-10-19Hard3-6 6-3 7-6(2)

Anna Blinkova

Toray Pan Pacific Open - Tokyo

2025-10-18Hard6-1 0-6 6-2

Sorana Cirstea

Japan Open - Osaka

2025-10-15Hard6-3 6-1

Linda Noskova

Japan Open - Osaka

2025-10-13Hard7-6(3) 6-3

Viktoriya Tomova

Wuhan Open - Wuhan

2025-10-04Hard3-6 6-4 6-1

Amanda Anisimova

China Open - Beijing

2025-09-26Hard6-1 6-3

Hailey Baptiste

China Open - Beijing

2025-09-24Hard7-5 5-7 6-4

Jessica Pegula

Billie Jean King Cup, Finals

2025-09-20I.Hard3-6 6-4 6-2

Moyuka Uchijima

Billie Jean King Cup, Finals

2025-09-18I.Hard6-2 6-1

Marta Kostyuk

U.S. Open - New York

2025-08-26Hard6-4 6-4

Viktorija Golubic

Tennis in the Land - Cleveland

2025-08-21Hard7-6(6) 1-6 6-4

Yue Yuan

Tennis in the Land - Cleveland

2025-08-18Hard6-4 6-3

Olga Danilovic

Cincinnati Open - Cincinnati

2025-08-07Hard6-0 7-5

Renata Zarazua

Omnium Banque Nationale - Montreal

2025-07-28Hard6-1 7-5

Maria Sakkari

Mubadala Citi DC Open - Washington

2025-07-21Hard6-3 6-4

Solana Sierra

Wimbledon - London

2025-07-02Grass6-7(7) 6-2 6-1

Paula Badosa Gibert

Wimbledon - London

2025-06-30Grass6-2 3-6 6-4

Mccartney Kessler

Rothesay Open - Nottingham

2025-06-20Grass6-3 3-6 6-4

Sonay Kartal

Rothesay Open - Nottingham

2025-06-19Grass6-4 1-6 7-5

Lulu Sun

Rothesay Open - Nottingham

2025-06-17Grass6-2 6-2

Diana Shnaider

LTA London Championships - London

2025-06-12Grass2-6 6-3 6-2

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