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

Simona Waltert

WTA1d inactive

Glicko-21.934

#91 overall·RD 66

Elo1.951#96 overall

Recent Form

40% Win Rate

Hard

Glicko-21.803#238

Elo1.702#254

Clay

Glicko-22.042#44

Elo1.865#33

Grass

Glicko-21.289#2473

Elo1.462#1942

Recent Matches

Teodora Kostovic

Makarska Open - Makarska

2026-06-02Clay6-0 6-3

Katerina Siniakova

French Open - Paris

2026-05-26Clay6-4 7-6(4)

Anhelina Kalinina

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-18Clay6-3 6-4

Hailey Baptiste

Internazionali BNL d'Italia - Rome

2026-05-08Clay6-7(9) 6-4 6-4

Yuliia Starodubtseva

Internazionali BNL d'Italia - Rome

2026-05-07Clay7-5 4-6 6-1

Yue Yuan

Internazionali BNL d'Italia - Rome

2026-05-05Clay6-2 1-6 7-5

Georgia Pedone

Internazionali BNL d'Italia - Rome

2026-05-04Clay6-2 7-6(4)

Mia Pohankova

W100 Wiesbaden

2026-04-30Clay3-6 7-6(8) 6-1

Lucija Ciric Bagaric

W100 Wiesbaden

2026-04-28Clay7-5 4-6 6-3

Jelena Ostapenko

Mutua Madrid Open - Madrid

2026-04-24Clay6-2 7-5

Oleksandra Oliynykova

Mutua Madrid Open - Madrid

2026-04-22Clay7-5 6-0

Dominika Salkova

Mutua Madrid Open - Madrid

2026-04-21Clay6-0 6-2

Despina Papamichail

Mutua Madrid Open - Madrid

2026-04-20Clay7-5 6-3

Maja Chwalinska

Oeiras Jamor Ladies Open - Oeiras

2026-04-17Clay6-1 6-0

Rebeka Masarova

Oeiras Jamor Ladies Open - Oeiras

2026-04-16Clay6-3 4-6 6-2

Katarzyna Kawa

Oeiras Jamor Ladies Open - Oeiras

2026-04-14Clay6-1 6-1

Whitney Osuigwe

Grand Prix Open Villa de Madrid - Madrid

2026-04-07Clay3-6 6-3 6-2

Ajla Tomljanovic

Miami Open - Miami

2026-03-17Hard6-3 6-4

Mccartney Kessler

Austin 125 - Austin

2026-03-09Hard7-6(6) 6-3

Himeno Sakatsume

BNP Paribas Open - Indian Wells

2026-03-01Hard6-4 6-4

Sonay Kartal

Qatar TotalEnergies Open - Doha

2026-02-06Hard7-5 2-6 6-4

Clara Tauson

Mubadala Abu Dhabi Open - Abu Dhabi

2026-02-03Hard6-3 6-1

Daria Kasatkina

Mubadala Abu Dhabi Open - Abu Dhabi

2026-02-02Hard7-6(5) 3-6 6-4

Katarzyna Piter

Mubadala Abu Dhabi Open - Abu Dhabi

2026-02-01Hard6-0 6-3

Arina Rodionova

Mubadala Abu Dhabi Open - Abu Dhabi

2026-01-31Hard6-2 1-0 ret.

Lanlana Tararudee

Philippine Women's Open - Manila

2026-01-26Hard6-2 3-6 6-2

Amanda Anisimova

Australian Open - Melbourne

2026-01-19Hard6-3 6-2

Renata Zarazua

Hobart International - Hobart

2026-01-11Hard6-4 6-3

Ava Beck

Hobart International - Hobart

2026-01-10Hard6-3 6-2

Daria Snigur

Workday Canberra International - Canberra

2026-01-08Hard6-2 6-4

Darja Vidmanova

Workday Canberra International - Canberra

2026-01-07Hard3-6 7-5 6-3

Dominika Salkova

Workday Canberra International - Canberra

2026-01-05Hard6-7(2) 7-6(0) 6-2

Solana Sierra

Billie Jean King Cup, PO, Group C

2025-11-16Clay6-3 7-6(8)

Rebecca Sramkova

Billie Jean King Cup, PO, Group C

2025-11-15Clay6-4 6-4

Mayar Sherif

Tucuman Open - Tucuman

2025-11-08Clay6-4 5-7 6-2

Julia Riera

Tucuman Open - Tucuman

2025-11-07Clay5-7 7-5 6-3

Gabriela Ce

Tucuman Open - Tucuman

2025-11-05Clay6-4 6-4

Martina Capurro Taborda

Tucuman Open - Tucuman

2025-11-04Clay6-1 6-2

Julia Grabher

Engie Open - Florianopolis

2025-10-24Clay6-4 6-3

Irene Burillo

Engie Open - Florianopolis

2025-10-23Clay7-5 6-4

Gabriela Ce

Engie Open - Florianopolis

2025-10-21Clay6-2 6-4

Alice Rame