FairValue

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

GKBrazil · Cercle Brugge

№ 477460Established €677k +1.08

Player dossierPro League

Warleson

GKGoalkeeperGoalkeeper

Club
Cercle Brugge
League
Pro League
Nationality
Brazil
Age
29
Height
190 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Warleson at €2M. Model A, which never saw Warleson during training, estimates €677k: the market value is 196% above that estimate.

That is a factor of ×2.96. 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 €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.

▲ +1.08A €677k▲ +0.66B €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
34
Minutes
2,823
Started
32/34
Min / app
83
Cards
3Y 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 Warleson…

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 €2M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2MModel A €677k

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

Warleson's percentiles among goalkeepers: Minutes, two years 50th, Starts 12th, Minutes, last 365 days 50th, European club minutes 80th50thMinutes12thStarts50thRecent80thEurope

Dashed ring: the goalkeeper median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

16% this player0% goalkeeper median80th 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
€50k
Dec 2017
Peak
€4.5M
Jun 2024
Model target
€2M
Jun 2026
Valuations
19
1 club change
Jun 2026€2MCercle BruggeValuation the model is trained to reproduce

Jun 2026: €2M, Cercle Brugge. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2017-12-07€50kUnknown
2020-03-30€100kCercle Brugge
2020-08-06€200kCercle Brugge
2020-10-16€300kCercle Brugge
2021-06-07€250kCercle Brugge
2022-01-06€250kCercle Brugge
2022-04-12€250kCercle Brugge
2022-11-04€250kCercle Brugge
2023-03-22€500kCercle Brugge
2023-06-09€400kCercle Brugge
2023-12-19€2MCercle Brugge
2024-03-22€3MCercle Brugge
2024-06-04€4.5MCercle Brugge
2024-12-11€4MCercle Brugge
2025-03-26€3MCercle Brugge
2025-06-12€2.5MCercle Brugge
2025-10-01€1.7MCercle Brugge
2025-12-10€1MCercle Brugge
2026-06-04€2MCercle Brugge

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
+1.084

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 →

Pro League350 players · median €1.8M

Valued above 50% of the 350 Pro League players.

€100k€750k€5M€30M€2MSee them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 59% of the 485 goalkeepers.

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

Where Warleson 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).