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

Katie Boulter

WOMEN

Age29

BirthplaceLeicester, England

Height1.82m

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:50%

Fatigue:0/100

Inactive:24 Days

Overall

Glicko-21.998

#47RD 69

Elo2.006

#70

Hard

Glicko-21.988

#48

Elo1.883

#48

Clay

Glicko-21.902

#144

Elo1.702

#225

Grass

Glicko-21.655

#68

Elo1.619

#45

Surface Record

HardClayGrass

202610-44-53-3

20257-143-44-3

202424-141-58-3

20238-8—7-3

20222-5—7-4

20216-8—4-2

Recent Matches

Tyra Caterina GrantWimbledon - London2026-06-30Grass6-4 6-2

Leylah Annie FernandezBad Homburg Open - Bad Homburg2026-06-21Grass6-7(5) 6-3 6-3

Donna VekicThe HSBC Championships - London2026-06-13Grass6-1 6-3

Jaqueline CristianThe HSBC Championships - London2026-06-12Grass6-1 6-3

Elena RybakinaThe HSBC Championships - London2026-06-12Grass7-5 2-6 6-4

Leylah Annie FernandezThe HSBC Championships - London2026-06-09Grass3-6 7-6(4) 7-5

Anastasia PotapovaFrench Open - Paris2026-05-28Clay5-7 6-4 6-2

Akasha UrhoboFrench Open - Paris2026-05-25Clay6-4 4-6 6-4

Anastasia ZakharovaTrophee Clarins - Paris2026-05-13Clay6-3 3-6 6-4

Kimberly BirrellTrophee Clarins - Paris2026-05-12Clay7-5 7-6(2)

Eva LysInternazionali BNL d'Italia - Rome2026-05-06Clay6-4 3-6 6-4

Jessica PegulaMutua Madrid Open - Madrid2026-04-24Clay6-4 6-4

Taylor TownsendMutua Madrid Open - Madrid2026-04-22Clay6-4 6-2

Veronika PodrezOpen Capfinances Rouen Metropole - Rouen2026-04-17Clay6-4 6-1

Jaqueline CristianOpen Capfinances Rouen Metropole - Rouen2026-04-15Clay7-6(5) 4-6 6-1

Maria TimofeevaOpen Capfinances Rouen Metropole - Rouen2026-04-13Clay6-2 6-2

Elena Gabriela RuseUpper Austria Ladies Linz - Linz2026-04-06Clay7-6(3) 7-6(2)

Karolina MuchovaMiami Open - Miami2026-03-21Hard6-3 7-5

Clara TausonMiami Open - Miami2026-03-20Hard6-7(4) 6-4 1-0 ret.

Jessica Bouzas ManeiroMiami Open - Miami2026-03-17Hard7-6(9) 6-4

Victoria Jimenez KasintsevaBNP Paribas Open - Indian Wells2026-03-03Hard2-6 7-5 6-2

Viktoriya TomovaBNP Paribas Open - Indian Wells2026-03-02Hard6-4 6-3

Jasmine PaoliniMerida Open Akron - Merida2026-02-27Hard0-6 6-3 6-3

Maria Camila Osorio SerranoMerida Open Akron - Merida2026-02-25Hard6-3 ret.

Beatriz Haddad MaiaMerida Open Akron - Merida2026-02-23Hard6-4 6-4

Tamara KorpatschOstrava Open - Ostrava2026-02-07I.Hard5-7 6-2 6-1

Katie VolynetsOstrava Open - Ostrava2026-02-06I.Hard6-1 6-3

Linda FruhvirtovaOstrava Open - Ostrava2026-02-05I.Hard6-3 6-2

Viktorija GolubicOstrava Open - Ostrava2026-02-04I.Hard6-2 6-2

Lucie HavlickovaOstrava Open - Ostrava2026-02-03I.Hard6-4 3-6 6-1

Belinda BencicAustralian Open - Melbourne2026-01-20Hard6-0 7-5

Elina SvitolinaASB Classic - Auckland2026-01-08Hard7-5 6-4

Yuliia StarodubtsevaASB Classic - Auckland2026-01-06Hard6-3 6-3

Alexandra EalaHong Kong Tennis Open - Hong Kong2025-10-28Hard6-4 2-1 ret.

Eva LysToray Pan Pacific Open - Tokyo2025-10-20Hard6-2 6-1

Kimberly BirrellToray Pan Pacific Open - Tokyo2025-10-19Hard3-6 6-3 7-6(2)

Anna BlinkovaToray Pan Pacific Open - Tokyo2025-10-18Hard6-1 0-6 6-2

Sorana CirsteaJapan Open - Osaka2025-10-15Hard6-3 6-1

Linda NoskovaJapan Open - Osaka2025-10-13Hard7-6(3) 6-3

Viktoriya TomovaWuhan Open - Wuhan2025-10-04Hard3-6 6-4 6-1

Amanda AnisimovaChina Open - Beijing2025-09-26Hard6-1 6-3

Hailey BaptisteChina Open - Beijing2025-09-24Hard7-5 5-7 6-4

Jessica PegulaBillie Jean King Cup, Finals2025-09-20I.Hard3-6 6-4 6-2

Moyuka UchijimaBillie Jean King Cup, Finals2025-09-18I.Hard6-2 6-1

Marta KostyukU.S. Open - New York2025-08-26Hard6-4 6-4

Viktorija GolubicTennis in the Land - Cleveland2025-08-21Hard7-6(6) 1-6 6-4

Yue YuanTennis in the Land - Cleveland2025-08-18Hard6-4 6-3

Olga DanilovicCincinnati Open - Cincinnati2025-08-07Hard6-0 7-5

Renata ZarazuaOmnium Banque Nationale - Montreal2025-07-28Hard6-1 7-5

Maria SakkariMubadala Citi DC Open - Washington2025-07-21Hard6-3 6-4

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