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

Tamara Zidansek

WTA1d inactive

Glicko-21.912

#113 overall·RD 73

Elo1.901#133 overall

Recent Form

20% Win Rate

Hard

Glicko-21.894#115

Elo1.710#235

Clay

Glicko-21.997#63

Elo1.827#52

Grass

Glicko-21.283#2476

Elo1.414#2016

Recent Matches

Elina Avanesyan

Makarska Open - Makarska

2026-06-02Clay7-5 4-6 6-3

Anna-Lena Friedsam

French Open - Paris

2026-05-20Clay6-3 6-4

Ekaterine Gorgodze

French Open - Paris

2026-05-18Clay0-6 6-4 6-4

Kaitlin Quevedo

Billie Jean King Cup, Qualifiers, SLO-ESP 1-3

2026-04-10Clay4-6 6-2 ret.

Anhelina Kalinina

Dubrovnik Open - Dubrovnik

2026-03-28Clay6-0 4-6 6-3

Veronika Erjavec

Dubrovnik Open - Dubrovnik

2026-03-27Clay7-6(4) 6-3

Sara Sorribes Tormo

Dubrovnik Open - Dubrovnik

2026-03-25Clay6-7(6) 6-2 6-1

Maja Chwalinska

Dubrovnik Open - Dubrovnik

2026-03-23Clay6-3 6-1

Anhelina Kalinina

Megasaray Hotels Open 3 - Antalya

2026-03-15Clay6-0 6-3

Veronika Erjavec

Megasaray Hotels Open 3 - Antalya

2026-03-14Clay6-0 6-3

Polina Kudermetova

Megasaray Hotels Open 3 - Antalya

2026-03-13Clay6-3 1-6 6-3

Maja Chwalinska

Megasaray Hotels Open 3 - Antalya

2026-03-12Clay6-7(1) 6-3 7-6(7)

Maria Sara Popa

Megasaray Hotels Open 3 - Antalya

2026-03-10Clay6-4 3-6 6-3

Katarzyna Kawa

Megasaray Hotels Open 2 - Antalya

2026-03-06Clay6-1 6-4

Leyre Romero Gormaz

Megasaray Hotels Open 2 - Antalya

2026-03-05Clay6-3 7-5

Veronika Erjavec

Megasaray Hotels Open 2 - Antalya

2026-03-03Clay7-5 4-6 7-6(3)

Sorana Cirstea

Transylvania Open - Cluj-Napoca

2026-02-04I.Hard6-1 6-0

Veronika Erjavec

Transylvania Open - Cluj-Napoca

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

Lucrezia Stefanini

Transylvania Open - Cluj-Napoca

2026-02-01I.Hard6-1 5-7 6-0

Ekaterine Gorgodze

Transylvania Open - Cluj-Napoca

2026-01-31I.Hard6-7(7) 6-2 6-1

Yue Yuan

Australian Open - Melbourne

2026-01-15Hard6-3 6-1

Lina Gjorcheska

Australian Open - Melbourne

2026-01-14Hard4-6 6-2 7-5

Jessika Ponchet

Australian Open - Melbourne

2026-01-12Hard7-6(3) 6-3

Joanna Garland