FairValue

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

Sanusi

LBNigeria · FC Porto

№ 544784Established €8M −0.98

Player dossierLiga Portugal

ZaiduSanusi

LBLeft-BackDefender

Club
FC Porto
League
Liga Portugal
Nationality
Nigeria
Age
28
Height
182 cm
Foot
Left
Valued
28 May 2026

Reading the valuation

The market values Sanusi at €3M. Model A, which never saw Sanusi during training, estimates €8M: the market value is 62% below that estimate.

That is a factor of ×2.66. 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 €3.4M, 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.

▼ −0.98A €8M▼ −0.14B €3.4M
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
32
Minutes
1,717
Goals
1
Assists
2
Started
19/32
Min / app
54
Cards
4Y 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 Sanusi…

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 €3M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €3MModel A €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 2,065 defenders

Zaidu Sanusi's percentiles among defenders: Goals per 90 65th, Assists per 90 79th, Minutes, two years 27th, Starts 15th, Minutes, last 365 days 48th, European club minutes 96th65thGoals79thAssists27thMinutes15thStarts48thRecent96thEurope

Dashed ring: the defender median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

32% this player0% defender median96th 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
€200k
Oct 2019
Peak
€10M
May 2022
Model target
€3M
May 2026
Valuations
20
1 club change
May 2026€3MFC PortoValuation the model is trained to reproduce

May 2026: €3M, FC Porto. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2019-10-11€200kCD Santa Clara
2019-12-30€500kCD Santa Clara
2020-04-08€400kCD Santa Clara
2020-08-17€2.5MCD Santa Clara
2020-10-22€4MFC Porto
2021-01-28€8MFC Porto
2021-05-21€8MFC Porto
2021-09-21€6MFC Porto
2021-12-27€6MFC Porto
2022-03-10€8MFC Porto
2022-05-31€10MFC Porto
2022-11-01€10MFC Porto
2023-06-16€8MFC Porto
2023-09-29€6MFC Porto
2023-12-27€3MFC Porto
2024-06-06€3MFC Porto
2024-12-19€3MFC Porto
2025-05-30€2MFC Porto
2025-12-18€3MFC Porto
2026-05-28€3MFC Porto

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
−0.980

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 →

Liga Portugal423 players · median €1M

Valued above 67% of the 423 Liga Portugal players.

€20k€200k€2M€20M€3MSee them in the Explorer →

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

Valued above 59% of the 2,065 defenders.

€20k€200k€2M€20M€3MSee them in the Explorer →

Where Sanusi 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).