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

Jelena Ostapenko

WOMENRising

Age29

BirthplaceRiga, Latvia

Height1.77m

Weight68kg

Best HandRight

Backhand—

Recent Form

Win Rate:63%

Fatigue:0/100

Inactive:21 Days

Overall

Glicko-22.044

#29RD 68

Elo2.116

#30

Hard

Glicko-21.952

#66

Elo1.882

#49

Clay

Glicko-22.145

#20

Elo1.844

#48

Grass

Glicko-21.783

#24

Elo1.698

#22

Surface Record

HardClayGrass

20269-87-55-2

20258-139-41-2

202418-118-65-3

202322-167-48-2

202222-133-38-3

202119-135-48-2

Recent Matches

Aryna SabalenkaWimbledon - London2026-07-03Grass6-4 6-4

Antonia RuzicWimbledon - London2026-07-01Grass6-2 6-0

Harriet DartWimbledon - London2026-06-29Grass6-3 3-6 6-4

Tatjana MariaLexus Eastbourne Open - Eastbourne2026-06-26Grass6-1 1-2 ret.

Zeynep SonmezLexus Eastbourne Open - Eastbourne2026-06-25Grass6-3 6-0

Panna UdvardyLexus Eastbourne Open - Eastbourne2026-06-24Grass3-6 6-1 6-2

Francesca JonesLexus Eastbourne Open - Eastbourne2026-06-22Grass6-2 6-2

Magda LinetteFrench Open - Paris2026-05-27Clay6-2 2-6 6-2

Ella SeidelFrench Open - Paris2026-05-25Clay6-4 6-4

Sorana CirsteaInternazionali BNL d'Italia - Rome2026-05-12Clay6-1 7-6(0)

Anna KalinskayaInternazionali BNL d'Italia - Rome2026-05-11Clay6-1 6-2

Qinwen ZhengInternazionali BNL d'Italia - Rome2026-05-09Clay4-6 6-4 6-4

Elena Gabriela RuseInternazionali BNL d'Italia - Rome2026-05-07Clay2-6 6-2 6-3

Lucrezia StefaniniInternazionali BNL d'Italia - Rome2026-05-06Clay6-0 6-1

Anastasia PotapovaMutua Madrid Open - Madrid2026-04-26Clay4-6 6-4 6-4

Simona WaltertMutua Madrid Open - Madrid2026-04-24Clay6-2 7-5

Mirra AndreevaPorsche Tennis Grand Prix - Stuttgart2026-04-15Clay5-7 6-2 6-4

Elena Gabriela RuseUpper Austria Ladies Linz - Linz2026-04-10Clay4-6 6-4 6-1

Alexandra EalaUpper Austria Ladies Linz - Linz2026-04-08Clay6-4 7-5

Hailey BaptisteMiami Open - Miami2026-03-23Hard6-3 6-4

Jasmine PaoliniMiami Open - Miami2026-03-22Hard5-7 6-2 7-5

Dayana YastremskaMiami Open - Miami2026-03-20Hard6-4 6-4

Jessica PegulaBNP Paribas Open - Indian Wells2026-03-09Hard4-6 6-3 6-2

Katie VolynetsBNP Paribas Open - Indian Wells2026-03-07Hard6-4 7-6(5)

Anna KalinskayaDubai Duty Free Championships - Dubai2026-02-16Hard2-6 6-1 6-4

Victoria MbokoQatar TotalEnergies Open - Doha2026-02-13Hard6-3 6-2

Elisabetta CocciarettoQatar TotalEnergies Open - Doha2026-02-12Hard7-5 6-4

Maria Camila Osorio SerranoQatar TotalEnergies Open - Doha2026-02-11Hard6-3 6-1

Ekaterina AlexandrovaQatar TotalEnergies Open - Doha2026-02-10Hard6-4 6-2

Anastasia ZakharovaQatar TotalEnergies Open - Doha2026-02-09Hard6-7(6) 6-3 6-4

Sara BejlekMubadala Abu Dhabi Open - Abu Dhabi2026-02-04Hard6-4 6-3

Oksana SelekhmetevaMubadala Abu Dhabi Open - Abu Dhabi2026-02-02Hard5-7 7-6(4) 6-2

Xinyu WangAustralian Open - Melbourne2026-01-22Hard4-6 6-4 6-4

Rebecca SramkovaAustralian Open - Melbourne2026-01-20Hard6-4 6-4

Tereza ValentovaAdelaide International - Adelaide2026-01-13Hard7-5 3-2 ret.

Sorana CirsteaBrisbane International - Brisbane2026-01-06Hard6-2 7-6(5)

Sorana CirsteaWuhan Open - Wuhan2025-10-07Hard6-0 2-1 ret.

Priscilla HonChina Open - Beijing2025-09-26Hard6-3 6-2

Marina StakusicGuadalajara Open Akron - Guadalajara2025-09-12Hard6-4 6-7(6) 6-2

Taylor TownsendU.S. Open - New York2025-08-27Hard7-5 6-1

Xiyu WangU.S. Open - New York2025-08-24Hard6-4 6-3

Lucia BronzettiCincinnati Open - Cincinnati2025-08-12Hard1-6 6-3 6-4

Naomi OsakaOmnium Banque Nationale - Montreal2025-08-01Hard6-2 6-4

Renata ZarazuaOmnium Banque Nationale - Montreal2025-07-30Hard6-2 4-6 6-2

Sonay KartalWimbledon - London2025-06-30Grass7-5 2-6 6-2

Alexandra EalaRothesay International - Eastbourne2025-06-25Grass0-6 6-2 3-2 ret.

Sonay KartalRothesay International - Eastbourne2025-06-24Grass6-3 7-6(2)

Elena RybakinaFrench Open - Paris2025-05-30Clay6-2 6-2

Caroline DolehideFrench Open - Paris2025-05-28Clay5-7 6-3 6-3

Polina KudermetovaFrench Open - Paris2025-05-26Clay5-7 6-0 6-2

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