FairValue

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

Promise

David

CFCanada · Union Saint-Gilloise

№ 888785Elite €9.4M +0.59

Image: FootyLogos

Player dossierPro League

PromiseDavid

CFCentre-ForwardAttack

Club
Union Saint-Gilloise
League
Pro League
Nationality
Canada
Age
24
Height
195 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values David at €17M. Model A, which never saw David during training, estimates €9.4M: the market value is 81% above that estimate.

That is a factor of ×1.81. 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 €13M, 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.

▲ +0.59A €9.4M▲ +0.26B €13M
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
3,501
Goals
23
Assists
6
Started
41/60
Min / app
58
Cards
11Y 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 David…

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 €17M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €17MModel A €9.4M

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 1,583 attackers

Promise David's percentiles among attackers: Goals per 90 94th, Assists per 90 53rd, Minutes, two years 73rd, Starts 65th, Minutes, last 365 days 69th, European club minutes 79th94thGoals53rdAssists73rdMinutes65thStarts69thRecent79thEurope

Dashed ring: the attacker median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.59 this player0.26 attacker median94th percentile

0.00peer deciles · median line · this player ●1.17

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
€10k
Nov 2021
Peak
€17M
Mar 2026
Model target
€17M
Jun 2026
Valuations
15
4 club changes
Jun 2026€17MUnion Saint-GilloiseValuation the model is trained to reproduce

Jun 2026: €17M, Union Saint-Gilloise. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2021-11-25€10kFC Tulsa
2022-04-20€100kValletta FC
2022-11-22€50kSirens FC
2023-04-05€50kKalju FC
2023-07-10€75kKalju FC
2023-11-29€125kKalju FC
2024-05-15€300kKalju FC
2024-10-02€400kUnion Saint-Gilloise
2024-12-11€1.5MUnion Saint-Gilloise
2025-03-26€6MUnion Saint-Gilloise
2025-06-12€11MUnion Saint-Gilloise
2025-10-01€13MUnion Saint-Gilloise
2025-12-10€13MUnion Saint-Gilloise
2026-03-13€17MUnion Saint-Gilloise
2026-06-04€17MUnion Saint-Gilloise

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
+0.592

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 97% of the 350 Pro League players.

€100k€750k€5M€30M€17MSee them in the Explorer →

Attackers, all leagues1,583 players · median €2.5M

Valued above 84% of the 1,583 attackers.

€20k€300k€5M€75M€17MSee them in the Explorer →

Where David 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).