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 Volynets

WOMENHot

Age24

BirthplaceWalnut Creek, USA

Height1.70m

Weight—

Best HandRight

Backhand—

Recent Form

Win Rate:75%

Fatigue:3/100

Inactive:12 Days

Overall

Glicko-21.998

#48RD 61

Elo2.028

#54

Hard

Glicko-21.954

#63

Elo1.848

#71

Clay

Glicko-21.994

#63

Elo1.798

#85

Grass

Glicko-21.756

#33

Elo1.622

#41

Surface Record

HardClayGrass

20264-62-51-2

20255-144-51-2

202410-133-31-1

20237-70-30-3

20221-31-20-1

20210-30-10-2

Recent Matches

Tatjana MariaHall of Fame Open - Newport2026-07-12Grass6-2 6-4

Greetje MinnenHall of Fame Open - Newport2026-07-11Grass6-3 6-2

Elizabeth MandlikHall of Fame Open - Newport2026-07-10Grass3-6 6-4 6-3

Kylie CollinsHall of Fame Open - Newport2026-07-09Grass6-3 6-4

Ariana ArseneaultHall of Fame Open - Newport2026-07-08Grass3-6 6-1 6-1

Leolia JeanjeanWimbledon - London2026-06-25Grass6-3 6-4

Elizara YanevaWimbledon - London2026-06-24Grass6-1 6-4

Laura SamsonWimbledon - London2026-06-23Grass7-6(5) 6-1

Jessica Bouzas ManeiroLexus Nottingham Open - Nottingham2026-06-17Grass7-5 1-0 ret.

Mccartney KesslerLexus Nottingham Open - Nottingham2026-06-16Grass6-3 6-3

Kimberly BirrellLexus Nottingham Open - Nottingham2026-06-14Grass2-6 6-4 7-6(3)

Panna UdvardyLexus Nottingham Open - Nottingham2026-06-13Grass7-5 6-2

Zeynep SonmezLibema Open - 's-Hertogenbosch2026-06-09Grass6-3 2-6 6-3

Lin ZhuLibema Open - 's-Hertogenbosch2026-06-07Grass6-7(4) 7-6(8) 6-1

Nao HibinoLibema Open - 's-Hertogenbosch2026-06-06Grass6-2 6-2

Marta KostyukFrench Open - Paris2026-05-27Clay6-7(4) 6-3 6-3

Clara BurelFrench Open - Paris2026-05-24Clay6-3 6-1

Yuliia StarodubtsevaTrophee Clarins - Paris2026-05-15Clay7-5 2-6 6-2

Emma NavarroTrophee Clarins - Paris2026-05-13Clay6-3 6-2

Alina KorneevaTrophee Clarins - Paris2026-05-11Clay6-1 6-4

Anhelina KalininaInternazionali BNL d'Italia - Rome2026-05-05Clay6-2 6-3

Darja SemenistajaInternazionali BNL d'Italia - Rome2026-05-04Clay6-2 6-0

Caty McNallyMutua Madrid Open - Madrid2026-04-22Clay6-1 6-2

Tamara KorpatschMutua Madrid Open - Madrid2026-04-21Clay7-5 5-7 6-2

Oceane DodinMutua Madrid Open - Madrid2026-04-20Clay6-0 4-6 6-1

Caty McNallyOpen Capfinances Rouen Metropole - Rouen2026-04-14Clay1-6 6-1 6-1

Donna VekicUpper Austria Ladies Linz - Linz2026-04-07Clay6-3 3-6 6-4

Dominika SalkovaUpper Austria Ladies Linz - Linz2026-04-06Clay3-6 6-2 6-4

Oceane DodinUpper Austria Ladies Linz - Linz2026-04-05Clay6-4 6-0

Diana ShnaiderCredit One Charleston Open - Charleston2026-04-01Clay7-5 7-5

Eva LysCredit One Charleston Open - Charleston2026-03-30Clay5-7 6-2 6-0

Tereza ValentovaMiami Open - Miami2026-03-19Hard6-2 6-4

Bianca Vanessa AndreescuMiami Open - Miami2026-03-17Hard7-5 6-2

Priscilla HonMiami Open - Miami2026-03-16Hard6-1 6-7(2) 6-3

Jelena OstapenkoBNP Paribas Open - Indian Wells2026-03-07Hard6-4 7-6(5)

Rebecca SramkovaBNP Paribas Open - Indian Wells2026-03-05Hard6-1 ret.

Nikola BartunkovaATX Open - Austin2026-02-23Hard6-4 7-5

Kimberly BirrellDubai Duty Free Championships - Dubai2026-02-14Hard6-3 6-1

Alycia ParksDubai Duty Free Championships - Dubai2026-02-13Hard7-6(5) 6-0

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

Alycia ParksOstrava Open - Ostrava2026-02-05I.Hard5-7 6-4 6-2

Tatjana MariaOstrava Open - Ostrava2026-02-03I.Hard7-5 6-1

Linda KlimovicovaOstrava Open - Ostrava2026-02-01I.Hard6-2 6-1

Iva JovicAustralian Open - Melbourne2026-01-19Hard6-2 6-3

Ann LiHobart International - Hobart2026-01-12Hard4-6 7-5 6-2

Ella SeidelHobart International - Hobart2026-01-11Hard3-6 6-1 6-4

Elizabeth MandlikHobart International - Hobart2026-01-10Hard6-2 6-4

Anna BondarBrisbane International - Brisbane2026-01-03Hard6-1 2-6 6-1

Rebeka MasarovaBrisbane International - Brisbane2026-01-02Hard6-4 6-4

Shuai ZhangGuangzhou Open - Guangzhou2025-10-24Hard7-6(5) 5-7 7-5

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