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

Fiona Ferro

WTA10d inactive

Glicko-21.928

#98 overall·RD 70

Elo1.915#119 overall

Recent Form

60% Win Rate

Hard

Glicko-21.913#100

Elo1.774#135

Clay

Glicko-22.004#60

Elo1.713#192

Grass

Glicko-21.499#2281

Elo1.438#1987

Recent Matches

Mirra Andreeva

French Open - Paris

2026-05-24Clay6-3 6-3

Jessica Bouzas Maneiro

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-20Clay2-6 7-6(2) 6-3

Danka Kovinic

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-18Clay6-2 6-3

Elina Avanesyan

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-17Clay6-7(1) 6-0 6-3

Ekaterina Kazionova

Grand Prix De SAR La Princesse Lalla Meryem - Rabat

2026-05-16Clay6-1 6-0

Madison Keys

Trophee Clarins - Paris

2026-05-12Clay6-4 6-2

Jessika Ponchet

Open 35 de Saint-Malo - Saint-Malo

2026-04-28Clay6-1 0-1 ret.

Polina Kudermetova

Oeiras Open CETO - Oeiras

2026-04-26Clay6-3 0-6 6-1

Linda Klimovicova

Oeiras Open CETO - Oeiras

2026-04-25Clay6-3 6-4

Elena Pridankina

Oeiras Open CETO - Oeiras

2026-04-24Clay7-6(1) 6-1

Lucie Havlickova

Oeiras Open CETO - Oeiras

2026-04-23Clay6-2 0-6 6-3

Bianca Vanessa Andreescu

Oeiras Open CETO - Oeiras

2026-04-21Clay6-0 2-6 6-4

Sorana Cirstea

Open Capfinances Rouen Metropole - Rouen

2026-04-15Clay6-3 6-7(5) 7-6(2)

Andrea Lazaro Garcia

Open Arena - Les Sables d'Olonne

2026-02-21I.Hard6-2 6-2

Sofia Costoulas

Open Arena - Les Sables d'Olonne

2026-02-20I.Hard6-4 6-3

Kristina Mladenovic

Open Arena - Les Sables d'Olonne

2026-02-19I.Hard6-1 3-2 ret.

Lucrezia Stefanini

Open Arena - Les Sables d'Olonne

2026-02-18I.Hard6-2 6-4

Nikola Bartunkova

Ostrava Open - Ostrava

2026-02-04I.Hard6-4 3-6 6-1

Brenda Fruhvirtova

Ostrava Open - Ostrava

2026-02-02I.Hard6-1 6-1

Laura Pigossi

Ostrava Open - Ostrava

2026-02-01I.Hard6-1 6-1

Dominika Salkova

Ostrava Open - Ostrava

2026-01-31I.Hard6-4 6-4

Alina Korneeva

W75 Manama 1

2026-01-25Hard6-4 6-0

Arantxa Rus

W75 Manama 1

2026-01-24Hard7-6(3) 6-3

Ekaterine Gorgodze

W75 Manama 1

2026-01-21Hard6-3 1-6 3-0 ret.

Erika Andreeva

W75 Manama 1

2026-01-20Hard6-2 6-1

Jenna Defalco

W75 Manama 1

2026-01-19Hard6-4 6-3

Linda Fruhvirtova

Australian Open - Melbourne

2026-01-14Hard6-4 3-6 6-4

Yeon Woo Ku

Australian Open - Melbourne

2026-01-12Hard6-3 6-2

Shuai Zhang

Brisbane International - Brisbane

2026-01-02Hard6-2 3-6 6-4

Alycia Parks

Open BLS de Limoges - Limoges

2025-12-10I.Hard6-2 7-5

Mona Barthel

Open BLS de Limoges - Limoges

2025-12-08I.Hard6-4 1-6 6-2

Tamara Korpatsch

Open In Arte Angers Loire - Angers

2025-12-04I.Hard6-2 6-3

Tina Nadine Smith

Open In Arte Angers Loire - Angers

2025-12-02I.Hard3-6 6-4 6-0

Sarah Iliev

W75 Blois 1

2025-06-17Clay6-2 7-6(5)

Julie Belgraver

W100 Biarritz 1

2025-06-13Clay6-2 6-1

Lanlana Tararudee

W100 Biarritz 1

2025-06-12Clay5-7 7-5 6-1

Maria Jose Portillo Ramirez

W100 Biarritz 1

2025-06-11Clay6-3 6-2

Carole Monnet

French Open - Paris

2025-05-21Clay7-5 6-2

Laura Pigossi

French Open - Paris

2025-05-19Clay6-2 7-5

Anastasia Zakharova

Trophee Clarins - Paris

2025-05-13Clay6-2 6-2

Sijia Wei

Trophee Clarins - Paris

2025-05-12Clay4-6 6-1 6-3

Leolia Jeanjean

Open 35 de Saint-Malo - Saint-Malo

2025-05-02Clay7-5 6-3

Emeline Dartron

Open 35 de Saint-Malo - Saint-Malo

2025-05-01Clay6-4 6-4

Noma Akugue Noha

Open 35 de Saint-Malo - Saint-Malo

2025-04-29Clay4-6 7-6(9) 6-3

Jessika Ponchet

Open Capfinances Rouen Metropole - Rouen

2025-04-16Clay7-6(4) 6-4

Mccartney Kessler

Open Capfinances Rouen Metropole - Rouen

2025-04-14Clay6-7(8) 6-2 7-5

Manon Leonard

Open Capfinances Rouen Metropole - Rouen

2025-04-13Clay7-5 6-2

Emeline Dartron

Open Capfinances Rouen Metropole - Rouen

2025-04-12Clay3-6 7-6(0) 6-1

Yuriko Miyazaki

W35 Helsinki 1

2025-03-07I.Hard6-2 6-3

Ella Haavisto

W35 Helsinki 1

2025-03-06I.Hard6-2 6-1

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