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

Janice Tjen

WTA1d inactive

Glicko-21.967

#68 overall·RD 71

Elo1.950#99 overall

Recent Form

40% Win Rate

Hard

Glicko-22.001#38

Elo1.889#45

Clay

Glicko-21.759#339

Elo1.622#433

Grass

Glicko-21.648#64

Elo1.512#171

Recent Matches

Nao Hibino

Lexus Birmingham Open - Birmingham

2026-06-02Grass6-4 3-6 6-2

Emma Navarro

French Open - Paris

2026-05-26Clay6-4 6-3

Maria Camila Osorio Serrano

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-20Clay6-3 3-6 6-0

Caijsa Wilda Hennemann

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-19Clay6-1 7-5

Peyton Stearns

Internazionali BNL d'Italia - Rome

2026-05-06Clay6-4 6-4

Liudmila Samsonova

Mutua Madrid Open - Madrid

2026-04-24Clay6-2 6-1

Alina Charaeva

Mutua Madrid Open - Madrid

2026-04-22Clay6-4 6-2

Aunchisa Chanta

Billie Jean King Cup, Group I, Asia/Oceania

2026-04-11Hard6-2 6-4

Eunhye Lee

Billie Jean King Cup, Group I, Asia/Oceania

2026-04-10Hard6-2 6-2

Sahaja Yamalapalli

Billie Jean King Cup, Group I, Asia/Oceania

2026-04-09Hard6-2 6-1

Monique Barry

Billie Jean King Cup, Group I, Asia/Oceania

2026-04-07Hard6-3 6-1

Mccartney Kessler

Credit One Charleston Open - Charleston

2026-04-01Clay6-2 6-1

Yulia Putintseva

Miami Open - Miami

2026-03-19Hard3-6 6-3 6-4

Jaqueline Cristian

BNP Paribas Open - Indian Wells

2026-03-04Hard4-6 6-4 7-6(6)

Maria Camila Osorio Serrano

Merida Open Akron - Merida

2026-02-24Hard6-4 6-3

Amanda Anisimova

Dubai Duty Free Championships - Dubai

2026-02-18Hard6-1 6-3

Leylah Annie Fernandez

Dubai Duty Free Championships - Dubai

2026-02-16Hard7-6(5) 6-4

Dayana Yastremska

Dubai Duty Free Championships - Dubai

2026-02-15Hard6-4 6-1

Iga Swiatek

Qatar TotalEnergies Open - Doha

2026-02-10Hard6-0 6-3

Beatriz Haddad Maia

Qatar TotalEnergies Open - Doha

2026-02-09Hard6-0 6-1

Liudmila Samsonova

Mubadala Abu Dhabi Open - Abu Dhabi

2026-02-03Hard6-2 6-2

Maya Joint

Mubadala Abu Dhabi Open - Abu Dhabi

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

Karolina Pliskova

Australian Open - Melbourne

2026-01-22Hard6-4 6-4

Leylah Annie Fernandez

Australian Open - Melbourne

2026-01-20Hard6-2 7-6(1)

Iva Jovic

Hobart International - Hobart

2026-01-13Hard6-0 6-1

Sonay Kartal

ASB Classic - Auckland

2026-01-06Hard6-1 6-7(4) 6-3

Kimberly Birrell

Chennai Open - Chennai

2025-11-02Hard6-4 6-3

Lanlana Tararudee

Chennai Open - Chennai

2025-11-01Hard7-6(6) 7-6(5)

Mia Pohankova

Chennai Open - Chennai

2025-10-31Hard6-3 6-1

Linda Fruhvirtova

Chennai Open - Chennai

2025-10-30Hard2-6 6-3 6-2

Caroline Werner

Chennai Open - Chennai

2025-10-29Hard6-4 6-7(5) 6-2

Tatiana Prozorova

Guangzhou Open - Guangzhou

2025-10-19Hard6-7(4) 6-4 7-6(4)

Anna Bondar

WTA 125 Jinan Open - Jinan

2025-10-18Hard6-4 4-6 6-4

Lulu Sun

WTA 125 Jinan Open - Jinan

2025-10-17Hard4-6 7-6(7) 6-4

Xinyu Gao

WTA 125 Jinan Open - Jinan

2025-10-16Hard6-4 6-0

Polina Iatcenko

WTA 125 Jinan Open - Jinan

2025-10-15Hard6-3 6-4

Yafan Wang

WTA 125 Jinan Open - Jinan

2025-10-14Hard6-4 6-7(4) 6-2

Varvara Lepchenko

Suzhou WTA 125 - Suzhou

2025-09-30Hard6-4 1-6 7-6(2)

Kyoka Okamura

Suzhou WTA 125 - Suzhou

2025-09-28Hard7-6(3) 6-2

Unknown Player

Suzhou WTA 125 - Suzhou

2025-09-27Hard6-2 6-1

Aliaksandra Sasnovich

China Open - Beijing

2025-09-25Hard6-7(4) 7-5 6-1

Viktoriya Tomova

China Open - Beijing

2025-09-23Hard6-2 7-6(2)

Lucrezia Stefanini

China Open - Beijing

2025-09-22Hard6-4 6-3

Tiantsoa Rakotomanga Rajaonah

SP Open - Sao Paulo

2025-09-14Hard6-3 6-4

Francesca Jones

SP Open - Sao Paulo

2025-09-13Hard7-6(0) 6-3

Alexandra Eala

SP Open - Sao Paulo

2025-09-12Hard6-4 6-1

Martina Okalova

SP Open - Sao Paulo

2025-09-10Hard6-1 6-0

Leolia Jeanjean

SP Open - Sao Paulo

2025-09-08Hard6-2 6-3

Emma Raducanu

U.S. Open - New York

2025-08-27Hard6-2 6-1

Veronika Kudermetova

U.S. Open - New York

2025-08-24Hard6-4 4-6 6-4

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