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

Eliot Spizzirri

MENInactive

Age24

BirthplaceGreenwich, Connecticut

Height1.85m

Weight79kg

Best HandRight

BackhandTwo-Handed

Recent Form

Win Rate:50%

Fatigue:0/100

Inactive:60 Days

Overall

Glicko-21.987

#59RD 83

Elo2.009

#53

Hard

Glicko-22.047

#34

Elo1.913

#27

Clay

Glicko-21.698

#596

Elo1.546

#994

Grass

Glicko-21.544

#175

Elo1.509

#212

Surface Record

HardClayGrass

20265-30-1—

20255-4——

20240-1—1-1

2023——0-1

Recent Matches

Frances TiafoeFrench Open - Paris2026-05-25Clay6-3 6-7(5) 6-4 6-3

Jack Pinnington JonesDallas Open - Dallas2026-02-12I.Hard7-6(5) 4-6 7-6(4)

James DuckworthDallas Open - Dallas2026-02-11I.Hard6-2 6-4

Jannik SinnerAustralian Open - Melbourne2026-01-24Hard4-6 6-3 6-4 6-4

Yibing WuAustralian Open - Melbourne2026-01-22Hard6-2 6-4 6-7(4) 4-6 6-3

Joao FonsecaAustralian Open - Melbourne2026-01-20Hard6-4 2-6 6-1 6-2

Fabian MarozsanASB Classic - Auckland2026-01-16Hard6-4 2-6 6-2

Nuno BorgesASB Classic - Auckland2026-01-14Hard7-6(6) 6-4

Adrian MannarinoASB Classic - Auckland2026-01-12Hard6-4 6-3

Juan Manuel CerundoloASB Classic - Auckland2026-01-11Hard6-4 6-3

Cristian GarinASB Classic - Auckland2026-01-10Hard6-2 6-4

Quentin HalysBrisbane International - Brisbane2026-01-03Hard6-4 6-3

Nuno BorgesHellenic Championship - Athens2025-11-04I.Hard5-7 6-3 6-4

Laslo DjereHellenic Championship - Athens2025-11-03I.Hard1-6 7-6(6) 6-2

Vit KoprivaHellenic Championship - Athens2025-11-02I.Hard4-6 7-5 6-2

Chun Hsin TsengHellenic Championship - Athens2025-11-01I.Hard6-1 6-3

Chris RodeschBratislava 2 Challenger2025-10-31I.Hard7-6(7) 6-7(1) 6-4

Chun Hsin TsengBratislava 2 Challenger2025-10-30I.Hard6-2 6-2

Moez EcharguiBratislava 2 Challenger2025-10-29I.Hard7-6(3) 6-2

Hugo GastonBrest Challenger2025-10-26I.Hard2-6 6-2 6-1

Francesco PassaroBrest Challenger2025-10-25I.Hard7-6(11) 6-3

Giulio ZeppieriBrest Challenger2025-10-24I.Hard5-7 7-6(8) 7-6(4)

Mark LajalBrest Challenger2025-10-23I.Hard3-6 6-1 6-3

Jonas ForejtekBrest Challenger2025-10-21I.Hard3-6 7-6(3) 6-3

Felix Auger AliassimeEuropean Open - Brussels2025-10-17I.Hard6-2 7-6(6)

Botic Van De ZandschulpEuropean Open - Brussels2025-10-16I.Hard7-5 6-0

Pedro Martinez PorteroEuropean Open - Brussels2025-10-14I.Hard6-4 6-1

Alexander BlockxEuropean Open - Brussels2025-10-13I.Hard7-6(4) 6-3

Zsombor PirosEuropean Open - Brussels2025-10-12I.Hard5-7 7-6(6) 6-1

Nikoloz BasilashviliShanghai Rolex Masters - Shanghai2025-09-30Hard6-4 6-4

Linang XiaoShanghai Rolex Masters - Shanghai2025-09-29Hard6-4 6-1

Alex BoltJingshan Challenger2025-09-28Hard6-4 6-4

Lloyd HarrisJingshan Challenger2025-09-27Hard7-6(4) ret.

Yannick HanfmannJingshan Challenger2025-09-27Hard7-5 4-6 6-4

Dalibor SvrcinaJingshan Challenger2025-09-26Hard4-6 6-4 6-2

Beibit ZhukayevJingshan Challenger2025-09-23Hard6-4 6-1

Valentin RoyerHangzhou Open - Hangzhou2025-09-17Hard7-5 4-6 6-3

Chun Hsin TsengHangzhou Open - Hangzhou2025-09-16Hard2-6 6-1 6-4

Luciano DarderiU.S. Open - New York2025-08-27Hard6-0 7-6(3) 2-6 6-4

Stefan DostanicU.S. Open - New York2025-08-24Hard7-5 6-4 7-6(4)

Lloyd HarrisCincinnati Open - Cincinnati2025-08-05Hard7-6(5) 4-6 7-6(2)

Bernard TomicLexington Challenger2025-08-02Hard6-3 2-6 7-6(3)

Dhakshineswar SureshLexington Challenger2025-08-01Hard7-6(4) 6-4

Rei SakamotoLexington Challenger2025-07-31Hard7-6(5) 6-7(7) 4-3 ret.

Stefan DostanicLexington Challenger2025-07-29Hard6-3 6-2

Andres MartinBloomfield Hills Challenger2025-07-26Hard6-1 7-6(5)

Yi ZhouBloomfield Hills Challenger2025-07-25Hard6-1 6-2

Michael ZhengBloomfield Hills Challenger2025-07-23Hard6-4 4-6 7-6(4)

Rei SakamotoBloomfield Hills Challenger2025-07-22Hard3-6 6-3 6-4

August HolmgrenGranby Challenger2025-07-19Hard6-4 6-1

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