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

Rebecca Sramkova

WTA9d inactive

Glicko-21.877

#142 overall·RD 67

Elo1.892#146 overall

Recent Form

60% Win Rate

Hard

Glicko-21.858#157

Elo1.744#176

Clay

Glicko-21.890#152

Elo1.759#129

Grass

Glicko-21.593#100

Elo1.498#1756

Recent Matches

Julia Grabher

French Open - Paris

2026-05-25Clay6-2 6-2

Maria Lourdes Carle

French Open - Paris

2026-05-22Clay6-4 5-7 6-2

Francisca Jorge

French Open - Paris

2026-05-20Clay6-3 6-4

Kayla Cross

French Open - Paris

2026-05-19Clay6-4 6-0

Taylor Townsend

Internazionali BNL d'Italia - Rome

2026-05-04Clay3-6 7-5 6-2

Caroline Werner

Catalonia Open Solgirones - La Bisbal D'Emporda

2026-04-29Clay7-5 2-6 6-1

Oksana Selekhmeteva

Catalonia Open Solgirones - La Bisbal D'Emporda

2026-04-27Clay6-2 6-4

Rebeka Masarova

Mutua Madrid Open - Madrid

2026-04-20Clay6-3 7-5

Petra Marcinko

Oeiras Jamor Ladies Open - Oeiras

2026-04-17Clay7-6(4) 5-7 6-3

Veronika Erjavec

Oeiras Jamor Ladies Open - Oeiras

2026-04-15Clay7-5 6-1

Lola Radivojevic

Oeiras Jamor Ladies Open - Oeiras

2026-04-13Clay2-6 6-4 6-3

Madalena Matias

Billie Jean King Cup, Group I, Europe/Africa

2026-04-10Clay6-1 6-1

Tara Wuerth

Billie Jean King Cup, Group I, Europe/Africa

2026-04-09Clay6-4 7-5

Lola Radivojevic

Billie Jean King Cup, Group I, Europe/Africa

2026-04-08Clay6-2 6-2

Justina Mikulskyte

Billie Jean King Cup, Group I, Europe/Africa

2026-04-08Clay6-4 6-3

Anastasia Zakharova

Miami Open - Miami

2026-03-17Hard6-3 6-2

Erika Andreeva

Miami Open - Miami

2026-03-16Hard6-4 6-2

Katie Volynets

BNP Paribas Open - Indian Wells

2026-03-05Hard6-1 ret.

Yue Yuan

ATX Open - Austin

2026-02-24Hard4-6 7-5 6-1

Varvara Gracheva

Dubai Duty Free Championships - Dubai

2026-02-16Hard7-5 1-6 6-4

Hailey Baptiste

Dubai Duty Free Championships - Dubai

2026-02-14Hard6-3 7-5

Antonia Ruzic

Dubai Duty Free Championships - Dubai

2026-02-13Hard5-7 7-5 6-1

Moyuka Uchijima

Qatar TotalEnergies Open - Doha

2026-02-06Hard4-6 7-6(4) 6-2

Linda Fruhvirtova

Ostrava Open - Ostrava

2026-02-04I.Hard6-3 6-1

Vendula Valdmannova

Ostrava Open - Ostrava

2026-02-03I.Hard6-2 6-3

Jelena Ostapenko

Australian Open - Melbourne

2026-01-20Hard6-4 6-4

Taylah Preston

Hobart International - Hobart

2026-01-14Hard6-4 6-1

Varvara Gracheva

Hobart International - Hobart

2026-01-13Hard6-4 4-6 6-2

Kimberly Birrell

Brisbane International - Brisbane

2026-01-05Hard6-4 3-6 6-3

Kamilla Rakhimova

Brisbane International - Brisbane

2026-01-03Hard6-1 6-2

Lizette Cabrera

Brisbane International - Brisbane

2026-01-02Hard6-4 6-2

Simona Waltert

Billie Jean King Cup, PO, Group C

2025-11-15Clay6-4 6-4

Solana Sierra

Billie Jean King Cup, PO, Group C

2025-11-14Clay6-2 6-4

Alina Charaeva

Toray Pan Pacific Open - Tokyo

2025-10-19Hard6-1 3-0 ret.

Ena Shibahara

Toray Pan Pacific Open - Tokyo

2025-10-18Hard6-4 4-6 7-5

Leylah Annie Fernandez

Japan Open - Osaka

2025-10-17Hard7-6(2) 6-3

Ann Li

Japan Open - Osaka

2025-10-16Hard6-2 3-6 6-3

Joanna Garland

Japan Open - Osaka

2025-10-14Hard6-3 6-1

Aryna Sabalenka

Wuhan Open - Wuhan

2025-10-08Hard4-6 6-3 6-1

Anna Kalinskaya

Wuhan Open - Wuhan

2025-10-07Hard6-2 3-6 6-3

Elena Gabriela Ruse

China Open - Beijing

2025-09-25Hard6-2 6-2

Ann Li

U.S. Open - New York

2025-08-25Hard4-6 6-2 6-4

Alycia Parks

Abierto GNP Seguros - Monterrey

2025-08-21Hard6-2 7-5

Leylah Annie Fernandez

Abierto GNP Seguros - Monterrey

2025-08-20Hard2-6 6-3 6-2

Victoria Rodriguez

Abierto GNP Seguros - Monterrey

2025-08-19Hard6-0 6-3

Magda Linette

Cincinnati Open - Cincinnati

2025-08-10Hard7-6(4) 6-0

Caroline Dolehide

Cincinnati Open - Cincinnati

2025-08-08Hard1-6 6-4 7-6(1)

Caty McNally

Omnium Banque Nationale - Montreal

2025-07-30Hard6-2 6-2

Tereza Valentova

Prague Open - Prague

2025-07-23Hard7-6(1) 7-5

Jesika Maleckova

Prague Open - Prague

2025-07-21Hard6-3 4-6 6-4

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