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

Ann Li

WOMEN

Age26

BirthplaceKing of Prussia, USA

Height1.70m

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:38%

Fatigue:9/100

Inactive:8 Days

Overall

Glicko-21.970

#68RD 67

Elo1.983

#83

Hard

Glicko-21.943

#74

Elo1.840

#76

Clay

Glicko-22.028

#48

Elo1.783

#101

Grass

Glicko-21.513

#165

Elo1.453

#1945

Surface Record

HardClayGrass

20266-99-62-3

202521-157-62-3

20246-42-1—

20231-4——

20228-110-13-4

202117-71-11-2

Recent Matches

Alina KorneevaAthens Open - Athens2026-07-16Hard6-2 6-2

Maria TimofeevaAthens Open - Athens2026-07-14Hard6-2 6-1

Zeynep SonmezWimbledon - London2026-06-29Grass7-5 1-6 6-4

Ekaterina AlexandrovaBad Homburg Open - Bad Homburg2026-06-23Grass6-1 6-7(5) 6-1

Viktorija GolubicLexus Nottingham Open - Nottingham2026-06-19Grass6-3 2-6 6-3

Taylah PrestonLexus Nottingham Open - Nottingham2026-06-18Grass5-7 6-2 6-2

Kimberly BirrellLexus Nottingham Open - Nottingham2026-06-16Grass4-6 7-6(3) 6-4

Diane ParryFrench Open - Paris2026-05-28Clay6-3 6-4

Shuai ZhangFrench Open - Paris2026-05-26Clay6-4 6-2

Emma NavarroInternationaux de Strasbourg - Strasbourg2026-05-22Clay6-1 6-3

Marie BouzkovaInternationaux de Strasbourg - Strasbourg2026-05-21Clay6-3 7-5

Ekaterina AlexandrovaInternationaux de Strasbourg - Strasbourg2026-05-19Clay4-6 6-4 6-3

Maya JointInternationaux de Strasbourg - Strasbourg2026-05-17Clay6-1 6-2

Liudmila SamsonovaInternazionali BNL d'Italia - Rome2026-05-08Clay6-4 6-3

Shuai ZhangInternazionali BNL d'Italia - Rome2026-05-05Clay1-6 6-4 6-2

Leylah Annie FernandezMutua Madrid Open - Madrid2026-04-27Clay6-3 6-2

Iga SwiatekMutua Madrid Open - Madrid2026-04-25Clay7-6(4) 2-6 3-0 ret.

Alycia ParksMutua Madrid Open - Madrid2026-04-23Clay6-2 6-7(5) 6-3

Marta KostyukOpen Capfinances Rouen Metropole - Rouen2026-04-17Clay6-0 6-7(4) 6-3

Kamilla RakhimovaOpen Capfinances Rouen Metropole - Rouen2026-04-15Clay4-6 6-2 6-3

Daria KasatkinaOpen Capfinances Rouen Metropole - Rouen2026-04-13Clay6-7(6) 6-2 6-4

Dayana YastremskaUpper Austria Ladies Linz - Linz2026-04-07Clay7-5 4-6 6-3

Aryna SabalenkaMiami Open - Miami2026-03-20Hard7-6(5) 6-4

Kimberly BirrellMiami Open - Miami2026-03-19Hard6-2 2-6 6-3

Talia GibsonBNP Paribas Open - Indian Wells2026-03-04Hard6-3 7-5

Zeynep SonmezMerida Open Akron - Merida2026-02-26Hard3-6 7-6(7) 6-4

Linda NoskovaDubai Duty Free Championships - Dubai2026-02-15Hard6-3 5-7 6-4

Elisabetta CocciarettoQatar TotalEnergies Open - Doha2026-02-11Hard7-6(5) 5-7 6-4

Magdalena FrechQatar TotalEnergies Open - Doha2026-02-10Hard6-3 6-4

Leylah Annie FernandezQatar TotalEnergies Open - Doha2026-02-08Hard6-4 6-3

Magda LinetteAustralian Open - Melbourne2026-01-21Hard6-3 6-3

Maria Camila Osorio SerranoAustralian Open - Melbourne2026-01-19Hard6-4 6-7(5) 7-5

Elisabetta CocciarettoHobart International - Hobart2026-01-14Hard1-6 7-5 7-5

Katie VolynetsHobart International - Hobart2026-01-12Hard4-6 7-5 6-2

Olivia GadeckiBrisbane International - Brisbane2026-01-05Hard6-4 6-4

Zhuoxuan BaiJiangxi Open - Jiujiang2025-10-28Hard6-3 6-1

Lulu SunGuangzhou Open - Guangzhou2025-10-26Hard7-6(6) 6-2

Shuai ZhangGuangzhou Open - Guangzhou2025-10-25Hard5-2 ret.

Elisabetta CocciarettoGuangzhou Open - Guangzhou2025-10-24Hard6-3 6-4

Maria Camila Osorio SerranoGuangzhou Open - Guangzhou2025-10-23Hard7-5 6-2

Victoria Jimenez KasintsevaGuangzhou Open - Guangzhou2025-10-21Hard6-4 7-6(4)

Rebecca SramkovaJapan Open - Osaka2025-10-16Hard6-2 3-6 6-3

Varvara GrachevaJapan Open - Osaka2025-10-14Hard6-4 6-0

Ekaterina AlexandrovaWuhan Open - Wuhan2025-10-08Hard7-6(5) 6-2

Emma RaducanuWuhan Open - Wuhan2025-10-07Hard6-1 4-1 ret.

Maria Camila Osorio SerranoChina Open - Beijing2025-09-25Hard7-5 6-7(5) 7-5

Jessica PegulaU.S. Open - New York2025-08-31Hard6-1 6-2

Priscilla HonU.S. Open - New York2025-08-29Hard7-5 6-3

Belinda BencicU.S. Open - New York2025-08-27Hard6-3 6-3

Rebecca SramkovaU.S. Open - New York2025-08-25Hard4-6 6-2 6-4

Simulate a match with LiGet win probability, VOPO edge vs Sharp Market odds, and Glicko-2 breakdown.

Open Simulator →