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

Zeynep Sonmez

WOMEN

Age24

BirthplaceIstanbul, Turkiye

Height—

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:63%

Fatigue:0/100

Inactive:23 Days

Overall

Glicko-21.994

#52RD 63

Elo2.037

#50

Hard

Glicko-21.924

#97

Elo1.839

#77

Clay

Glicko-21.947

#104

Elo1.732

#160

Grass

Glicko-21.712

#45

Elo1.614

#47

Surface Record

HardClayGrass

20266-74-45-4

202511-101-32-1

20248-41-41-1

2023—2-10-1

2022—0-1—

Recent Matches

Claire LiuWimbledon - London2026-07-01Grass7-5 6-3

Ann LiWimbledon - London2026-06-29Grass7-5 1-6 6-4

Jelena OstapenkoLexus Eastbourne Open - Eastbourne2026-06-25Grass6-3 6-0

Harriet DartLexus Eastbourne Open - Eastbourne2026-06-23Grass4-6 6-2 7-5

Elsa JacquemotLexus Eastbourne Open - Eastbourne2026-06-21Grass2-6 6-1 6-3

Hanne VandewinkelLexus Eastbourne Open - Eastbourne2026-06-20Grass6-3 6-4

Viktorija GolubicLexus Nottingham Open - Nottingham2026-06-18Grass7-5 4-6 6-4

Leylah Annie FernandezLexus Nottingham Open - Nottingham2026-06-16Grass6-4 7-6(1)

Hannah KlugmanLexus Nottingham Open - Nottingham2026-06-14Grass6-2 6-4

Lanlana TararudeeLexus Nottingham Open - Nottingham2026-06-13Grass6-4 6-0

Magda LinetteLibema Open - 's-Hertogenbosch2026-06-12Grass6-4 6-2

Anastasia PotapovaLibema Open - 's-Hertogenbosch2026-06-11Grass6-1 2-0 ret.

Katie VolynetsLibema Open - 's-Hertogenbosch2026-06-09Grass6-3 2-6 6-3

Daria KasatkinaFrench Open - Paris2026-05-25Clay6-4 6-4

Jessica PegulaInternazionali BNL d'Italia - Rome2026-05-08Clay6-4 6-0

Jennifer RuggeriInternazionali BNL d'Italia - Rome2026-05-05Clay4-6 6-2 6-2

Solana SierraMutua Madrid Open - Madrid2026-04-26Clay0-6 6-2 6-3

Cristina BucsaMutua Madrid Open - Madrid2026-04-24Clay6-1 6-7(4) 6-2

Carlota Martinez CirezMutua Madrid Open - Madrid2026-04-22Clay7-5 6-2

Leylah Annie FernandezPorsche Tennis Grand Prix - Stuttgart2026-04-16Clay6-7(2) 6-1 7-6(5)

Jasmine PaoliniPorsche Tennis Grand Prix - Stuttgart2026-04-15Clay6-2 6-2

Anna-Lena FriedsamPorsche Tennis Grand Prix - Stuttgart2026-04-12Clay6-4 6-0

Victoria PohlePorsche Tennis Grand Prix - Stuttgart2026-04-11Clay6-3 6-4

Belinda BencicMiami Open - Miami2026-03-20Hard6-3 6-2

Beatriz Haddad MaiaMiami Open - Miami2026-03-17Hard6-3 6-2

Anna KalinskayaBNP Paribas Open - Indian Wells2026-03-06Hard6-4 7-6(4)

Mccartney KesslerBNP Paribas Open - Indian Wells2026-03-04Hard7-6(7) 6-0

Cristina BucsaMerida Open Akron - Merida2026-02-27Hard6-3 6-4

Ann LiMerida Open Akron - Merida2026-02-26Hard3-6 7-6(7) 6-4

Cadence BraceMerida Open Akron - Merida2026-02-24Hard6-2 6-0

Sara BejlekDubai Duty Free Championships - Dubai2026-02-15Hard6-2 6-2

Maria SakkariQatar TotalEnergies Open - Doha2026-02-09Hard6-1 6-3

Alexandra EalaMubadala Abu Dhabi Open - Abu Dhabi2026-02-02Hard6-4 6-3

Yulia PutintsevaAustralian Open - Melbourne2026-01-23Hard6-3 6-7(3) 6-3

Anna BondarAustralian Open - Melbourne2026-01-21Hard6-2 6-4

Ekaterina AlexandrovaAustralian Open - Melbourne2026-01-18Hard7-5 4-6 6-4

Anastasia GasanovaAustralian Open - Melbourne2026-01-15Hard6-3 6-2

Julia RieraAustralian Open - Melbourne2026-01-14Hard6-3 6-1

Laura SamsonAustralian Open - Melbourne2026-01-12Hard6-2 6-2

Elena Gabriela RuseBrisbane International - Brisbane2026-01-03Hard3-6 6-4 6-0

Victoria Jimenez KasintsevaBrisbane International - Brisbane2026-01-02Hard6-1 3-6 7-6(3)

Anna-Lena FriedsamOpen In Arte Angers Loire - Angers2025-12-05I.Hard5-7 6-3 6-4

Amandine MonnotOpen In Arte Angers Loire - Angers2025-12-03I.Hard3-6 6-1 6-1

Victoria Jimenez KasintsevaOpen In Arte Angers Loire - Angers2025-12-02I.Hard3-6 7-6(5) 6-3

Hanne VandewinkelBillie Jean King Cup, PO, Group F2025-11-15I.Hard6-4 6-4

Eva LysBillie Jean King Cup, PO, Group F2025-11-14I.Hard6-2 4-6 6-0

Lanlana TararudeeChennai Open - Chennai2025-10-30Hard2-6 6-3 6-3

Tatiana ProzorovaChennai Open - Chennai2025-10-29Hard7-5 6-4

Maria SakkariToray Pan Pacific Open - Tokyo2025-10-18Hard7-5 6-3

Ajla TomljanovicNingbo Open - Ningbo2025-10-15Hard7-6(6) 6-3

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

Open Simulator →