FairValue

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

Murillo

CBBrazil · Nottingham Forest

№ 1005649World Class €42.5M +0.16

Image: FootyLogos

Player dossierPremier League

Murillo

CBCentre-BackDefender

Club
Nottingham Forest
League
Premier League
Nationality
Brazil
Age
23
Height
180 cm
Foot
Left
Valued
3 Jun 2026

Reading the valuation

The market values Murillo at €50M. Model A, which never saw Murillo during training, estimates €42.5M: the market value is 18% above that estimate.

That is a factor of ×1.18. 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 €10.5M, 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.

▲ +0.16A €42.5M▲ +1.56B €10.5M
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
78
Minutes
6,365
Goals
4
Assists
0
Started
73/78
Min / app
82
Cards
13Y 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 Murillo…

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 €50M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €50MModel A €42.5M

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

Murillo's percentiles among defenders: Goals per 90 68th, Assists per 90 17th, Minutes, two years 95th, Starts 80th, Minutes, last 365 days 85th, European club minutes 73rd68thGoals17thAssists95thMinutes80thStarts85thRecent73rdEurope

Dashed ring: the defender median (50th percentile)

Minutes, two years

Total club minutes in the two-year window: how much the player was used.

6,365 this player2,860 defender median95th percentile

451peer deciles · median line · this player ●9,111

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
€500k
Apr 2023
Peak
€55M
Mar 2025
Model target
€50M
Jun 2026
Valuations
13
1 club change
Jun 2026€50MNottingham ForestValuation the model is trained to reproduce

Jun 2026: €50M, Nottingham Forest. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2023-04-07€500kSport Club Corinthians Paulista
2023-07-25€3.5MSport Club Corinthians Paulista
2023-10-09€9MNottingham Forest
2023-12-19€22MNottingham Forest
2024-03-14€25MNottingham Forest
2024-05-27€35MNottingham Forest
2024-10-01€40MNottingham Forest
2024-12-16€50MNottingham Forest
2025-03-18€55MNottingham Forest
2025-05-30€55MNottingham Forest
2025-12-09€55MNottingham Forest
2026-03-09€50MNottingham Forest
2026-06-03€50MNottingham Forest

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
+0.162

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 →

Premier League555 players · median €18M

Valued above 88% of the 555 Premier League players.

€150k€1M€7.5M€50M€50MSee them in the Explorer →

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

Valued above 98% of the 2,065 defenders.

€20k€200k€2M€20M€50MSee them in the Explorer →

Where Murillo 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).