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

Zhizhen Zhang

ATP2d inactive42 Low Fatigue

Glicko-21.853

#212 overall·RD 73

Elo1.790#300 overall

Recent Form

40% Win Rate

Hard

Glicko-21.883#203

Elo1.681#340

Clay

Glicko-21.714#539

Elo1.713#218

Grass

Glicko-21.687#49

Elo1.551#96

Recent Matches

Marc-Andrea Huesler

Birmingham Challenger

2026-06-01Grass6-2 2-6 7-6(3)

Patrick Brady

Birmingham Challenger

2026-05-31Grass7-5 7-6(4)

Facundo Diaz Acosta

French Open - Paris

2026-05-26Clay6-1 6-4 6-3

Aleksandar Kovacevic

Hamburg Open - Hamburg

2026-05-16Clay6-7(6) 7-5 6-2

Zdenek Kolar

Oeiras 4 Challenger

2026-05-12Clay6-3 6-4

Joao Domingues

Oeiras 4 Challenger

2026-05-11Clay6-7(3) 7-5 6-3

Cezar Cretu

Oeiras 4 Challenger

2026-05-11Clay7-6(9) 2-6 6-4

Daniel Altmaier

Internazionali BNL d'Italia - Rome

2026-05-06Clay4-6 7-6(3) 6-4

Vit Kopriva

Mutua Madrid Open - Madrid

2026-04-22Clay6-2 6-0

Luciano Darderi

BMW Open - Munich

2026-04-14Clay7-6(5) 3-6 6-1

Ben Shelton

US Men's Clay Court Championship - Houston

2026-04-02Clay7-6(5) 7-6(3)

Jack Pinnington Jones

US Men's Clay Court Championship - Houston

2026-03-30Clay6-1 6-3

Adrian Mannarino

Miami Open - Miami

2026-03-19Hard6-3 6-2

Chak Lam Coleman Wong

Cap Cana Challenger

2026-03-09Hard6-1 3-6 6-3

Felix Auger Aliassime

Dubai Duty Free Tennis Championships - Dubai

2026-02-23Hard6-3 7-6(4)

Jakub Mensik

Qatar ExxonMobil Open - Doha

2026-02-18Hard6-3 6-2

Roberto Carballes Baena

Qatar ExxonMobil Open - Doha

2026-02-17Hard6-4 6-4

Alex Bolt

Brisbane 2 Challenger

2026-02-15Hard6-2 6-4

Rei Sakamoto

Brisbane 2 Challenger

2026-02-14Hard6-1 6-4

Hayato Matsuoka

Brisbane 2 Challenger

2026-02-13Hard6-3 7-5

Yasutaka Uchiyama

Brisbane 2 Challenger

2026-02-11Hard6-4 7-6(7)

Pavle Marinkov

Brisbane 2 Challenger

2026-02-10Hard7-6(4) 6-3

Nuno Borges

Davis Cup, Group I, PO, CHN-POR 3-1

2026-02-07I.Hard7-5 6-4

Otto Virtanen

Manama Challenger

2026-01-27Hard4-6 7-6(12) 7-6(5)

Francisco Cerundolo

Australian Open - Melbourne

2026-01-18Hard6-3 7-6(0) 6-3

Felix Auger Aliassime

United Cup - Australia

2026-01-04Hard6-4 6-4

Zizou Bergs

United Cup - Australia

2026-01-03Hard6-7(2) 7-6(3) 7-5

Sebastian Baez

Shanghai Rolex Masters - Shanghai

2025-10-01Hard2-6 6-3 6-4

Terence Atmane

China Open - Beijing

2025-09-25Hard6-4 6-2

Dalibor Svrcina

Hangzhou Open - Hangzhou

2025-09-20Hard6-4 6-3

Bu Yunchaokete

Hangzhou Open - Hangzhou

2025-09-18Hard6-7(2) 6-4 7-6(3)

Gabriel Diallo

BNP Paribas Open - Indian Wells

2025-03-06Hard2-6 6-2 7-6(7)

Giovanni Mpetshi Perricard

Dubai Duty Free Tennis Championships - Dubai

2025-02-24Hard6-3 7-6(3)

Luca Nardi

Qatar ExxonMobil Open - Doha

2025-02-18Hard6-4 6-3

Zizou Bergs

Open 13 Provence - Marseille

2025-02-14I.Hard7-5 ret.

Hubert Hurkacz

Open 13 Provence - Marseille

2025-02-13I.Hard6-4 6-7(1) 6-3

Quentin Halys

Open 13 Provence - Marseille

2025-02-11I.Hard6-3 6-7(2) 7-6(3)

Andrey Rublev

ABN AMRO Open - Rotterdam

2025-02-04I.Hard6-3 6-4

Holger Rune

Australian Open - Melbourne

2025-01-14Hard4-6 6-3 6-4 3-6 6-4

Denis Shapovalov

Adelaide International - Adelaide

2025-01-06Hard6-3 6-4

Taylor Fritz

United Cup - Australia

2025-01-01Hard6-4 6-4

Alexander Zverev

United Cup - Australia

2024-12-30Hard2-6 6-0 6-2

Thiago Moura Monteiro

United Cup - Australia

2024-12-27Hard6-3 6-0

Tomas Martin Etcheverry

Rolex Paris Masters - Paris

2024-10-28I.Hard6-3 7-6(6)

Grigor Dimitrov

Erste Bank Open - Vienna

2024-10-23I.Hard6-4 7-5

Aslan Karatsev

Almaty Open - Almaty

2024-10-15I.Hard6-4 7-6(2)

Zizou Bergs

Shanghai Rolex Masters - Shanghai

2024-10-03Hard6-4 6-3

Alejandro Davidovich Fokina

China Open - Beijing

2024-09-27Hard6-3 4-6 6-3

Marin Cilic

Hangzhou Open - Hangzhou

2024-09-24Hard7-6(5) 7-6(5)

Bu Yunchaokete

Hangzhou Open - Hangzhou

2024-09-23Hard7-6(3) 6-4

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