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

Sara Bejlek

WTA7d inactive❄️ -62.9 COLD

Glicko-21.970

#63 overall·RD 77

Elo2.001#70 overall

Recent Form

20% Win Rate

Hard

Glicko-22.001#36

Elo1.829#83

Clay

Glicko-21.901#141

Elo1.867#32

Grass

Glicko-21.499#2280

Elo1.419#2009

Recent Matches

Iga Swiatek

French Open - Paris

2026-05-27Clay6-2 6-3

Sloane Stephens

French Open - Paris

2026-05-24Clay6-3 6-2

Emma Navarro

Internationaux de Strasbourg - Strasbourg

2026-05-17Clay6-1 6-4

Alina Charaeva

Trophee Clarins - Paris

2026-05-12Clay6-4 6-0

Laura Siegemund

Internazionali BNL d'Italia - Rome

2026-05-06Clay6-4 6-4

Belinda Bencic

Credit One Charleston Open - Charleston

2026-04-02Clay7-6(4) 6-2

Akasha Urhobo

Credit One Charleston Open - Charleston

2026-04-01Clay6-1 6-1

Talia Gibson

Miami Open - Miami

2026-03-19Hard6-1 6-0

Zeynep Sonmez

Dubai Duty Free Championships - Dubai

2026-02-15Hard6-2 6-2

Ekaterina Alexandrova