FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Portrait of Diego Moreira

Diego

Moreira

LMBelgium · RC Strasbourg Alsace

№ 655006Elite €27.8M −0.10

Image: FootyLogos

Player dossierLigue 1

DiegoMoreira

LMLeft MidfieldMidfield

Club
RC Strasbourg Alsace
League
Ligue 1
Nationality
Belgium
Age
21
Height
179 cm
Foot
Left
Valued
1 Jun 2026

Reading the valuation

The market values Moreira at €25M. Model A, which never saw Moreira during training, estimates €27.8M: the market value is 10% below that estimate.

That is a factor of ×1.11. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €16.9M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

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

▼ −0.10A €27.8M▲ +0.39B €16.9M
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
60
Minutes
4,711
Goals
6
Assists
15
Started
53/60
Min / app
79
Cards
9Y 1R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Moreira…

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 €25M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €25MModel A €27.8M

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 1,687 midfielders

Diego Moreira's percentiles among midfielders: Goals per 90 61st, Assists per 90 95th, Minutes, two years 84th, Starts 84th, Minutes, last 365 days 69th, European club minutes 61st61stGoals95thAssists84thMinutes84thStarts69thRecent61stEurope

Dashed ring: the midfielder median (50th percentile)

Assists per 90

Club assists per 90 minutes in the same window.

0.29 this player0.09 midfielder median95th percentile

0.00peer deciles · median line · this player ●0.74

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
€750k
Jun 2022
Peak
€25M
Mar 2026
Model target
€25M
Jun 2026
Valuations
14
4 club changes
Jun 2026€25MRC Strasbourg AlsaceValuation the model is trained to reproduce

Jun 2026: €25M, RC Strasbourg Alsace. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2022-06-27€750kSL Benfica U19
2022-09-16€1MSL Benfica B
2022-11-01€2MSL Benfica B
2022-12-28€2MSL Benfica B
2023-06-28€2MSL Benfica B
2023-10-16€3MOlympique Lyon
2023-12-18€3MOlympique Lyon
2024-05-27€3MChelsea FC
2024-12-10€6MRC Strasbourg Alsace
2025-03-24€10MRC Strasbourg Alsace
2025-06-03€18MRC Strasbourg Alsace
2025-12-15€18MRC Strasbourg Alsace
2026-03-27€25MRC Strasbourg Alsace
2026-06-01€25MRC Strasbourg Alsace

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
−0.105

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 →

Ligue 1423 players · median €5M

Valued above 89% of the 423 Ligue 1 players.

€100k€750k€5M€30M€25MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 91% of the 1,687 midfielders.

€20k€200k€2M€20M€25MSee them in the Explorer →

Where Moreira 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).