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

Maria Sakkari

WOMEN34Hot

Age31

BirthplaceAthens, Greece

Height1.72m

Weight62kg

Best HandRight

Backhand—

Recent Form

Win Rate:75%

Fatigue:34/100

Inactive:5 Days

Overall

Glicko-22.010

#42RD 68

Elo2.085

#35

Hard

Glicko-22.069

#19

Elo1.948

#29

Clay

Glicko-21.998

#62

Elo1.794

#92

Grass

Glicko-21.550

#128

Elo1.581

#66

Surface Record

HardClayGrass

202612-63-52-3

202512-175-53-3

202412-911-62-3

202328-185-44-3

202226-148-57-4

202128-159-41-1

Recent Matches

Barbora KrejcikovaAthens Open - Athens2026-07-19Hard7-6(5) 6-3

Alina KorneevaAthens Open - Athens2026-07-18Hard6-1 7-5

Alycia ParksAthens Open - Athens2026-07-17Hard6-4 6-3

Harriet DartAthens Open - Athens2026-07-15Hard6-1 6-2

Polina KudermetovaAthens Open - Athens2026-07-13Hard6-0 7-6(1)

Jasmine PaoliniWimbledon - London2026-07-04Grass6-1 6-2

Kamilla RakhimovaWimbledon - London2026-07-02Grass6-3 0-6 7-6(7)

Clara TausonWimbledon - London2026-06-30Grass6-3 6-3

Qinwen ZhengLexus Nottingham Open - Nottingham2026-06-15Grass4-6 7-6(1) 6-4

Tatjana MariaThe HSBC Championships - London2026-06-09Grass6-3 6-3

Maja ChwalinskaFrench Open - Paris2026-05-30Clay1-6 6-3 6-2

Claire LiuFrench Open - Paris2026-05-28Clay6-7(7) 6-3 6-3

Linda NoskovaFrench Open - Paris2026-05-26Clay7-5 7-6(3)

Peyton StearnsInternationaux de Strasbourg - Strasbourg2026-05-17Clay6-3 6-1

Elena RybakinaInternazionali BNL d'Italia - Rome2026-05-08Clay6-4 6-1

Lilli TaggerInternazionali BNL d'Italia - Rome2026-05-06Clay5-7 6-3 6-0

Karolina PliskovaMutua Madrid Open - Madrid2026-04-24Clay6-4 7-6(6)

Paula Badosa GibertCredit One Charleston Open - Charleston2026-04-01Clay6-3 6-4

Alycia ParksMiami Open - Miami2026-03-20Hard6-3 6-3

Iga SwiatekBNP Paribas Open - Indian Wells2026-03-09Hard6-3 6-2

Lilli TaggerBNP Paribas Open - Indian Wells2026-03-07Hard7-5 6-0

Karolina MuchovaQatar TotalEnergies Open - Doha2026-02-13Hard3-6 6-4 6-1

Iga SwiatekQatar TotalEnergies Open - Doha2026-02-12Hard2-6 6-4 7-5

Varvara GrachevaQatar TotalEnergies Open - Doha2026-02-11Hard7-6(3) 6-0

Jasmine PaoliniQatar TotalEnergies Open - Doha2026-02-10Hard6-4 6-2

Zeynep SonmezQatar TotalEnergies Open - Doha2026-02-09Hard6-1 6-3

Mirra AndreevaAustralian Open - Melbourne2026-01-21Hard6-0 6-4

Leolia JeanjeanAustralian Open - Melbourne2026-01-18Hard6-4 6-2

Daria KasatkinaAdelaide International - Adelaide2026-01-12Hard7-6(2) 6-4

Cori GauffUnited Cup - Australia2026-01-07Hard6-3 6-2

Emma RaducanuUnited Cup - Australia2026-01-05Hard6-3 3-6 6-1

Naomi OsakaUnited Cup - Australia2026-01-02Hard6-4 6-2

Leylah Annie FernandezToray Pan Pacific Open - Tokyo2025-10-21Hard7-6(5) 6-4

Suzan LamensToray Pan Pacific Open - Tokyo2025-10-19Hard6-3 6-3

Zeynep SonmezToray Pan Pacific Open - Tokyo2025-10-18Hard7-5 6-3

Ashlyn KruegerJapan Open - Osaka2025-10-13Hard2-6 6-3 6-4

Leylah Annie FernandezChina Open - Beijing2025-09-26Hard6-2 6-0

Ashlyn KruegerChina Open - Beijing2025-09-24Hard7-6(5) 6-7(5) 7-5

Elsa JacquemotGuadalajara Open Akron - Guadalajara2025-09-09Hard6-2 6-0

Beatriz Haddad MaiaU.S. Open - New York2025-08-30Hard6-1 6-2

Anna BondarU.S. Open - New York2025-08-28Hard6-3 6-1

Tatjana MariaU.S. Open - New York2025-08-25Hard6-3 6-2

Donna VekicAbierto GNP Seguros - Monterrey2025-08-18Hard6-2 6-3

Jasmine PaoliniCincinnati Open - Cincinnati2025-08-10Hard7-6(2) 7-6(5)

Kamilla RakhimovaCincinnati Open - Cincinnati2025-08-08Hard6-3 3-6 6-2

Jessica PegulaOmnium Banque Nationale - Montreal2025-07-30Hard7-5 6-4

Carson BranstineOmnium Banque Nationale - Montreal2025-07-28Hard6-2 3-6 7-5

Emma RaducanuMubadala Citi DC Open - Washington2025-07-25Hard6-4 7-5

Emma NavarroMubadala Citi DC Open - Washington2025-07-23Hard7-5 7-6(1)

Katie BoulterMubadala Citi DC Open - Washington2025-07-21Hard6-3 6-4

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