FairValue

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

Esgaio

RBPortugal · FC Arouca

№ 581121Emerging €1.1M −0.08

Player dossierLiga Portugal

TiagoEsgaio

RBRight-BackDefender

Club
FC Arouca
League
Liga Portugal
Nationality
Portugal
Age
30
Height
175 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Esgaio at €1M. Model A, which never saw Esgaio during training, estimates €1.1M: the market value is 8% below that estimate.

That is a factor of ×1.08. 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 €1.4M, 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.

▼ −0.08A €1.1M▼ −0.31B €1.4M
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
54
Minutes
4,647
Goals
5
Assists
6
Started
52/54
Min / app
86
Cards
12Y 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 Esgaio…

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 €1M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1MModel A €1.1M

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

Tiago Esgaio's percentiles among defenders: Goals per 90 86th, Assists per 90 81st, Minutes, two years 78th, Starts 88th, Minutes, last 365 days 75th, European club minutes 30th86thGoals81stAssists78thMinutes88thStarts75thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

96% this player83% defender median88th percentile

18%peer deciles · median line · this player ●100%

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
€100k
Oct 2019
Peak
€1M
May 2021
Model target
€1M
May 2026
Valuations
17
1 club change
May 2026€1MFC AroucaValuation the model is trained to reproduce

May 2026: €1M, FC Arouca. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2019-10-11€100kB SAD (2018-2024)
2019-12-30€400kB SAD (2018-2024)
2020-04-08€325kB SAD (2018-2024)
2020-08-17€500kB SAD (2018-2024)
2021-01-28€800kB SAD (2018-2024)
2021-05-21€1MB SAD (2018-2024)
2021-12-27€800kFC Arouca
2022-03-10€600kFC Arouca
2022-05-31€500kFC Arouca
2022-11-01€700kFC Arouca
2023-06-16€900kFC Arouca
2023-12-27€900kFC Arouca
2024-06-06€1MFC Arouca
2024-12-19€900kFC Arouca
2025-05-30€900kFC Arouca
2025-12-18€900kFC Arouca
2026-05-28€1MFC Arouca

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
−0.080

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 42% of the 423 Liga Portugal players.

€20k€200k€2M€20M€1MSee them in the Explorer →

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

Valued above 35% of the 2,065 defenders.

€20k€200k€2M€20M€1MSee them in the Explorer →

Where Esgaio 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).