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

Zeynep Sonmez

WTA9d inactive

Glicko-21.945

#84 overall·RD 71

Elo1.979#78 overall

Recent Form

40% Win Rate

Hard

Glicko-21.924#92

Elo1.839#73

Clay

Glicko-21.947#102

Elo1.732#160

Grass

Glicko-21.701#48

Elo1.584#57

Recent Matches

Daria Kasatkina

French Open - Paris

2026-05-25Clay6-4 6-4

Jessica Pegula

Internazionali BNL d'Italia - Rome

2026-05-08Clay6-4 6-0

Jennifer Ruggeri

Internazionali BNL d'Italia - Rome

2026-05-05Clay4-6 6-2 6-2

Solana Sierra

Mutua Madrid Open - Madrid

2026-04-26Clay0-6 6-2 6-3

Cristina Bucsa

Mutua Madrid Open - Madrid

2026-04-24Clay6-1 6-7(4) 6-2

Carlota Martinez Cirez

Mutua Madrid Open - Madrid

2026-04-22Clay7-5 6-2

Leylah Annie Fernandez

Porsche Tennis Grand Prix - Stuttgart

2026-04-16Clay6-7(2) 6-1 7-6(5)

Jasmine Paolini

Porsche Tennis Grand Prix - Stuttgart

2026-04-15Clay6-2 6-2

Anna-Lena Friedsam

Porsche Tennis Grand Prix - Stuttgart

2026-04-12Clay6-4 6-0

Victoria Pohle

Porsche Tennis Grand Prix - Stuttgart

2026-04-11Clay6-3 6-4

Belinda Bencic

Miami Open - Miami

2026-03-20Hard6-3 6-2

Beatriz Haddad Maia

Miami Open - Miami

2026-03-17Hard6-3 6-2

Anna Kalinskaya

BNP Paribas Open - Indian Wells

2026-03-06Hard6-4 7-6(4)

Mccartney Kessler

BNP Paribas Open - Indian Wells

2026-03-04Hard7-6(7) 6-0

Cristina Bucsa

Merida Open Akron - Merida

2026-02-27Hard6-3 6-4

Ann Li

Merida Open Akron - Merida

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

Cadence Brace

Merida Open Akron - Merida

2026-02-24Hard6-2 6-0

Sara Bejlek

Dubai Duty Free Championships - Dubai

2026-02-15Hard6-2 6-2

Maria Sakkari

Qatar TotalEnergies Open - Doha

2026-02-09Hard6-1 6-3

Alexandra Eala

Mubadala Abu Dhabi Open - Abu Dhabi

2026-02-02Hard6-4 6-3

Yulia Putintseva

Australian Open - Melbourne

2026-01-23Hard6-3 6-7(3) 6-3

Anna Bondar

Australian Open - Melbourne

2026-01-21Hard6-2 6-4

Ekaterina Alexandrova

Australian Open - Melbourne

2026-01-18Hard7-5 4-6 6-4

Anastasia Gasanova

Australian Open - Melbourne

2026-01-15Hard6-3 6-2

Julia Riera

Australian Open - Melbourne

2026-01-14Hard6-3 6-1

Laura Samson

Australian Open - Melbourne

2026-01-12Hard6-2 6-2

Elena Gabriela Ruse

Brisbane International - Brisbane

2026-01-03Hard3-6 6-4 6-0

Victoria Jimenez Kasintseva

Brisbane International - Brisbane

2026-01-02Hard6-1 3-6 7-6(3)

Anna-Lena Friedsam

Open In Arte Angers Loire - Angers

2025-12-05I.Hard5-7 6-3 6-4

Amandine Monnot

Open In Arte Angers Loire - Angers

2025-12-03I.Hard3-6 6-1 6-1

Victoria Jimenez Kasintseva

Open In Arte Angers Loire - Angers

2025-12-02I.Hard3-6 7-6(5) 6-3

Hanne Vandewinkel

Billie Jean King Cup, PO, Group F

2025-11-15I.Hard6-4 6-4

Eva Lys

Billie Jean King Cup, PO, Group F

2025-11-14I.Hard6-2 4-6 6-0

Lanlana Tararudee

Chennai Open - Chennai

2025-10-30Hard2-6 6-3 6-3

Tatiana Prozorova

Chennai Open - Chennai

2025-10-29Hard7-5 6-4

Maria Sakkari

Toray Pan Pacific Open - Tokyo

2025-10-18Hard7-5 6-3

Ajla Tomljanovic

Ningbo Open - Ningbo

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

Aliaksandra Sasnovich

Ningbo Open - Ningbo

2025-10-13Hard2-6 7-5 6-3

Yidi Yang

Ningbo Open - Ningbo

2025-10-12Hard6-1 6-1

Linda Fruhvirtova

Ningbo Open - Ningbo

2025-10-11Hard6-4 6-1

Yafan Wang

Wuhan Open - Wuhan

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

Anastasia Potapova

China Open - Beijing

2025-09-29Hard6-3 7-5

Clara Tauson

China Open - Beijing

2025-09-27Hard6-4 2-6 6-3

Sijia Wei

China Open - Beijing

2025-09-25Hard6-2 6-0

Tatjana Maria

Guadalajara Open Akron - Guadalajara

2025-09-09Hard6-4 6-2

Marta Kostyuk

U.S. Open - New York

2025-08-28Hard7-5 6-7(5) 6-3

Katie Volynets

U.S. Open - New York

2025-08-25Hard6-3 6-4

Marie Bouzkova

Abierto GNP Seguros - Monterrey

2025-08-18Hard3-6 6-2 6-4

Dominika Salkova

Polish Open - Warsaw

2025-07-30Hard6-3 6-2

Urszula Radwanska

Polish Open - Warsaw

2025-07-29Hard6-2 6-0

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