FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Zaid

Romero

CBArgentina · Getafe CF

№ 741142Established €3.9M −0.46

Player dossierLaLiga

ZaidRomero

CBCentre-BackDefender

Club
Getafe CF
League
LaLiga
Nationality
Argentina
Age
26
Height
192 cm
Foot
Left
Valued
5 Jun 2026

Reading the valuation

The market values Romero at €2.5M. Model A, which never saw Romero during training, estimates €3.9M: the market value is 37% below that estimate.

That is a factor of ×1.58. 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 €3.1M, 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.

▼ −0.46A €3.9M▼ −0.23B €3.1M
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
33
Minutes
2,095
Goals
1
Assists
0
Started
23/33
Min / app
63
Cards
5Y 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 Romero…

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 €2.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2.5MModel A €3.9M

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 2,065 defenders

Zaid Romero's percentiles among defenders: Goals per 90 59th, Assists per 90 17th, Minutes, two years 36th, Starts 27th, Minutes, last 365 days 42nd, European club minutes 63rd59thGoals17thAssists36thMinutes27thStarts42ndRecent63rdEurope

Dashed ring: the defender median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

2% this player0% defender median63rd percentile

0%peer deciles · median line · this player ●85%

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
€50k
Mar 2020
Peak
€6M
Jun 2024
Model target
€2.5M
Jun 2026
Valuations
16
5 club changes
Jun 2026€2.5MGetafe CFValuation the model is trained to reproduce

Jun 2026: €2.5M, Getafe CF. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-03-20€50kCD Godoy Cruz Antonio Tomba
2021-02-08€50kCD Godoy Cruz Antonio Tomba
2021-12-22€100kClub Villa Dálmine
2022-06-20€600kLDU Quito
2022-12-30€700kLDU Quito
2023-07-04€1.5MClub Estudiantes de La Plata
2023-12-19€1.5MClub Estudiantes de La Plata
2024-03-11€3.2MClub Estudiantes de La Plata
2024-06-12€6MClub Estudiantes de La Plata
2024-12-11€5MClub Brugge KV
2025-03-26€4MClub Brugge KV
2025-06-12€3MClub Brugge KV
2025-10-01€2.5MClub Brugge KV
2025-12-10€2MClub Brugge KV
2026-03-16€2.5MGetafe CF
2026-06-05€2.5MGetafe CF

Audit context group-level, not about this player

Audit group
non-UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
−0.456

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 →

LaLiga509 players · median €4M

Valued above 34% of the 509 LaLiga players.

€100k€1M€10M€100M€2.5MSee them in the Explorer →

Defenders, all leagues2,065 players · median €2M

Valued above 54% of the 2,065 defenders.

€20k€200k€2M€20M€2.5MSee them in the Explorer →

Where Romero appears

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).