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

Ella Seidel

WTA9d inactive

Glicko-21.838

#196 overall·RD 65

Elo1.838#210 overall

Recent Form

40% Win Rate

Hard

Glicko-21.898#112

Elo1.775#133

Clay

Glicko-21.767#321

Elo1.657#321

Grass

Glicko-21.532#136

Elo1.539#103

Recent Matches

Jelena Ostapenko

French Open - Paris

2026-05-25Clay6-4 6-4

Emiliana Arango

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-19Clay6-3 4-6 6-1

Erika Andreeva

W75 Zagreb

2026-05-17Clay6-3 3-6 6-3

Kajsa Rinaldo Persson

W75 Zagreb

2026-05-16Clay7-5 6-2

Caijsa Wilda Hennemann

W75 Zagreb

2026-05-14Clay6-2 1-6 6-4

Xinran Sun

W75 Zagreb

2026-05-13Clay6-2 6-0

Denislava Glushkova

W75 Zagreb

2026-05-13Clay6-2 6-0

Alina Korneeva

Internazionali BNL d'Italia - Rome

2026-05-04Clay7-6(1) 3-6 6-2

Noma Akugue Noha

W100 Wiesbaden

2026-04-30Clay6-7(3) 7-5 6-4

Elise Mertens

Porsche Tennis Grand Prix - Stuttgart

2026-04-14Clay6-3 6-4

Justina Mikulskyte

Billie Jean King Cup, Group I, Europe/Africa

2026-04-11Clay1-6 6-3 6-2

Johanne Svendsen

Billie Jean King Cup, Group I, Europe/Africa

2026-04-09Clay1-6 7-6(8) 6-0

Kajsa Rinaldo Persson

Billie Jean King Cup, Group I, Europe/Africa

2026-04-08Clay6-1 6-3

Francisca Jorge

Billie Jean King Cup, Group I, Europe/Africa

2026-04-08Clay6-2 7-5

Darja Semenistaja

Copa Colsanitas - Bogota

2026-03-31Clay6-2 6-2

Lilli Tagger

Miami Open - Miami

2026-03-19Hard6-7(8) 6-4 7-5

Rebeka Masarova

Miami Open - Miami

2026-03-17Hard6-1 5-7 7-5

Marina Stakusic

Miami Open - Miami

2026-03-16Hard6-4 7-5

Kimberly Birrell

Austin 125 - Austin

2026-03-10Hard7-6(7) 6-1

Anastasia Zakharova

BNP Paribas Open - Indian Wells

2026-03-04Hard6-2 6-2

Jaqueline Cristian

Dubai Duty Free Championships - Dubai

2026-02-17Hard6-0 ret.

Cristina Bucsa

Dubai Duty Free Championships - Dubai

2026-02-15Hard6-1 6-4

Kamilla Rakhimova

Dubai Duty Free Championships - Dubai

2026-02-14Hard1-6 7-6(5) 6-4

Anastasia Potapova

Dubai Duty Free Championships - Dubai

2026-02-13Hard6-4 6-3

Tereza Valentova

Qatar TotalEnergies Open - Doha

2026-02-07Hard3-6 6-2 6-4

Katarzyna Kawa

Qatar TotalEnergies Open - Doha

2026-02-06Hard2-6 6-4 6-1

Anna Bondar

Transylvania Open - Cluj-Napoca

2026-02-01I.Hard4-6 7-6(6) 6-0

Oksana Selekhmeteva

Australian Open - Melbourne

2026-01-19Hard6-3 3-6 6-0

Anna Bondar

Hobart International - Hobart

2026-01-13Hard6-0 6-1

Katie Volynets

Hobart International - Hobart

2026-01-11Hard3-6 6-1 6-4

Suzan Lamens

Hobart International - Hobart

2026-01-10Hard4-6 6-2 6-2

Sonay Kartal

ASB Classic - Auckland

2026-01-08Hard6-3 6-1

Monique Barry

ASB Classic - Auckland

2026-01-06Hard6-2 6-1

Hanne Vandewinkel

Billie Jean King Cup, PO, Group F

2025-11-16I.Hard6-0 6-4

Berfu Cengiz

Billie Jean King Cup, PO, Group F

2025-11-14I.Hard6-1 6-1

Tamara Korpatsch

Jiangxi Open - Jiujiang

2025-10-29Hard3-6 6-0 6-1

Tiantsoa Rakotomanga Rajaonah

Jiangxi Open - Jiujiang

2025-10-27Hard6-4 6-3

Claire Liu

Guangzhou Open - Guangzhou

2025-10-24Hard4-6 6-0 6-4

Yulia Putintseva

Guangzhou Open - Guangzhou

2025-10-23Hard6-3 6-2

Leolia Jeanjean

Guangzhou Open - Guangzhou

2025-10-21Hard6-2 6-2

Marta Kostyuk

China Open - Beijing

2025-09-27Hard6-1 6-1

Magdalena Frech

China Open - Beijing

2025-09-25Hard7-5 6-4

Emiliana Arango

China Open - Beijing

2025-09-23Hard6-4 7-5

Jessika Ponchet

China Open - Beijing

2025-09-22Hard6-4 6-3

Ekaterina Alexandrova

Korea Open - Seoul

2025-09-20Hard6-2 6-3

Beatriz Haddad Maia

Korea Open - Seoul

2025-09-18Hard6-7(4) 7-6(3) 7-5

Jessika Ponchet

Korea Open - Seoul

2025-09-15Hard5-7 6-4 6-2

Anastasia Zakharova

Korea Open - Seoul

2025-09-14Hard3-6 6-3 6-3

Mai Hontama

Korea Open - Seoul

2025-09-13Hard6-2 3-6 7-6(7)

Destanee Aiava

U.S. Open - New York

2025-08-22Hard5-7 6-1 7-6(6)

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