FairValue

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

GKBrazil · Pisa Sporting Club

№ 99523Emerging €192k −0.65

Player dossierSerie A

Nícolas

GKGoalkeeperGoalkeeper

Club
Pisa Sporting Club
League
Serie A
Nationality
Brazil
Age
38
Height
190 cm
Foot
Right
Valued
29 May 2026

Reading the valuation

The market values Nícolas at €100k. Model A, which never saw Nícolas during training, estimates €192k: the market value is 48% below that estimate.

That is a factor of ×1.92. 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 €109k, 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.

▼ −0.65A €192k▼ −0.09B €109k
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
6
Minutes
540
Started
6/6
Min / app
90
Cards
0Y 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 Nícolas…

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 €100k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €100kModel A €192k

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

Nícolas's percentiles among goalkeepers: Minutes, two years 4th, Starts 62nd, Minutes, last 365 days 21st, European club minutes 32nd4thMinutes62ndStarts21stRecent32ndEurope

Dashed ring: the goalkeeper median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player100% goalkeeper median62nd percentile

70%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
€50k
Jan 2009
Peak
€900k
Dec 2017
Model target
€100k
May 2026
Valuations
33
7 club changes
May 2026€100kPisa Sporting ClubValuation the model is trained to reproduce

May 2026: €100k, Pisa Sporting Club. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2009-01-17€50kClube Atlético Mineiro
2011-09-14€50kHellas Verona
2012-01-01€50kHellas Verona
2012-06-14€50kHellas Verona
2012-12-25€75kHellas Verona
2013-06-25€75kHellas Verona
2014-01-07€100kHellas Verona
2014-07-01€100kHellas Verona
2015-02-10€350kSS Virtus Lanciano
2015-06-29€300kSS Virtus Lanciano
2015-12-28€350kTrapani Calcio
2016-06-13€400kTrapani Calcio
2016-12-19€500kHellas Verona
2017-06-09€500kHellas Verona
2017-12-29€900kHellas Verona
2018-06-07€900kHellas Verona
2018-12-20€700kUdinese Calcio
2019-06-06€700kUdinese Calcio
2019-12-12€500kUdinese Calcio
2020-04-08€400kUdinese Calcio
2020-08-25€350kUdinese Calcio
2020-12-29€350kUdinese Calcio
2021-06-24€350kReggina 1914
2021-12-29€450kPisa Sporting Club
2022-06-06€450kPisa Sporting Club
2022-12-22€300kPisa Sporting Club
2023-06-12€300kPisa Sporting Club
2023-12-27€300kPisa Sporting Club
2024-06-03€250kPisa Sporting Club
2024-12-23€200kPisa Sporting Club
2025-06-02€100kPisa Sporting Club
2025-12-23€100kPisa Sporting Club
2026-05-29€100kPisa Sporting Club

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
−0.651

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 →

Serie A507 players · median €5.5M

The lowest observed value among 507 Serie A players.

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

Goalkeepers, all leagues485 players · median €1M

Valued above 3% of the 485 goalkeepers.

€20k€200k€2M€20M€100kSee them in the Explorer →

Where Nícolas 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).