SemuelPizzignacco

GKGoalkeeperGoalkeeper

Club: AC Monza
League: Serie A
Nationality: Italy
Age: 24
Height: 188 cm
Foot: Right
Valued: 11 Dec 2025

Reading the valuation

The market values Pizzignacco at €750k. Model A, which never saw Pizzignacco during training, estimates €1.6M: the market value is 54% below that estimate.

That is a factor of ×2.17. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.

Without league and club, Model B estimates €826k, closer to the market here, although it is usually further off (typical miss ×2.07).

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).

Apps: 12
Minutes: 1,036
Started: 11/12
Min / app: 86
Cards: 0Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Pizzignacco…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €750k

Checking API

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 485 goalkeepers

Dashed ring: the goalkeeper median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

0% this player0% goalkeeper median32nd percentile

0%peer deciles · median line · this player ●86%

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation: €25k; Dec 2019
Peak: €800k; Oct 2024
Model target: €750k; Dec 2025
Valuations: 14; 5 club changes

Dec 2025€750kAC MonzaValuation the model is trained to reproduce

Dec 2025: €750k, AC Monza. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table

Date	Market value	Club
2019-12-18	€25k	LR Vicenza Virtus
2020-06-17	€25k	LR Vicenza Virtus
2021-01-12	€100k	FC Legnago Salus
2021-10-14	€350k	LR Vicenza
2021-12-29	€350k	LR Vicenza
2022-06-20	€300k	AC Renate
2022-12-19	€325k	Feralpisalò
2023-06-19	€400k	Feralpisalò
2023-12-27	€400k	Feralpisalò
2024-06-03	€400k	Feralpisalò
2024-10-18	€800k	AC Monza
2024-12-18	€800k	AC Monza
2025-06-17	€800k	AC Monza
2025-12-11	€750k	AC Monza

Audit context group-level, not about this player

Audit group: UEFA
Population gap, Model A: +0.093 95% CI +0.063 to +0.124
This player, market vs held-out A: −0.776

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Serie A507 players · median €5.5M

Valued above 4% of the 507 Serie A players.

See them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 38% of the 485 goalkeepers.

See them in the Explorer →

Where Pizzignacco appears

TerminalSerie A in the Player Explorer
TerminalSerie A on the League Landscape

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).