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

Jessica Pegula

WTA8d inactive

Glicko-22.244

#5 overall·RD 70

Elo2.324#7 overall

Recent Form

60% Win Rate

Hard

Glicko-22.263#3

Elo2.250#3

Clay

Glicko-22.223#10

Elo1.893#21

Grass

Glicko-21.849#8

Elo1.660#20

Recent Matches

Kimberly Birrell

French Open - Paris

2026-05-26Clay1-6 6-3 6-3

Iga Swiatek

Internazionali BNL d'Italia - Rome

2026-05-13Clay6-1 6-2

Anastasia Potapova

Internazionali BNL d'Italia - Rome

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

Rebeka Masarova

Internazionali BNL d'Italia - Rome

2026-05-10Clay6-0 6-0

Zeynep Sonmez

Internazionali BNL d'Italia - Rome

2026-05-08Clay6-4 6-0

Marta Kostyuk

Mutua Madrid Open - Madrid

2026-04-26Clay6-1 6-4

Katie Boulter

Mutua Madrid Open - Madrid

2026-04-24Clay6-4 6-4

Yuliia Starodubtseva

Credit One Charleston Open - Charleston

2026-04-05Clay6-2 6-2

Iva Jovic

Credit One Charleston Open - Charleston

2026-04-04Clay6-4 5-7 6-3

Diana Shnaider

Credit One Charleston Open - Charleston

2026-04-03Clay3-6 6-3 6-2

Elisabetta Cocciaretto

Credit One Charleston Open - Charleston

2026-04-02Clay1-6 6-1 7-6(1)

Yulia Putintseva

Credit One Charleston Open - Charleston

2026-04-01Clay4-6 6-4 7-5

Elena Rybakina

Miami Open - Miami

2026-03-25Hard2-6 6-3 6-4

Jaqueline Cristian

Miami Open - Miami

2026-03-23Hard6-4 6-1

Leylah Annie Fernandez

Miami Open - Miami

2026-03-22Hard6-2 6-2

Francesca Jones

Miami Open - Miami

2026-03-21Hard6-1 3-0 ret.

Elena Rybakina

BNP Paribas Open - Indian Wells

2026-03-12Hard6-1 7-6(4)

Belinda Bencic

BNP Paribas Open - Indian Wells

2026-03-11Hard6-3 7-6(5)

Jelena Ostapenko

BNP Paribas Open - Indian Wells

2026-03-09Hard4-6 6-3 6-2

Donna Vekic

BNP Paribas Open - Indian Wells

2026-03-07Hard4-6 6-2 6-3

Elina Svitolina