FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Portrait of Nicolò Barella

Nicolò

Barella

CMItaly · Inter Milan

№ 255942World Class €34.9M +0.36

Close-up

Image: FootyLogos

Player dossierSerie A

NicolòBarella

CMCentral MidfieldMidfield

Club
Inter Milan
League
Serie A
Nationality
Italy
Age
29
Height
175 cm
Foot
Right
Valued
29 May 2026

Reading the valuation

The market values Barella at €50M. Model A, which never saw Barella during training, estimates €34.9M: the market value is 43% above that estimate.

That is a factor of ×1.43. 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 €31.7M, 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.

▲ +0.36A €34.9M▲ +0.46B €31.7M
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
99
Minutes
7,447
Goals
6
Assists
18
Started
87/99
Min / app
75
Cards
16Y 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 Barella…

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 €50M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €50MModel A €34.9M

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 1,687 midfielders

Nicolò Barella's percentiles among midfielders: Goals per 90 45th, Assists per 90 87th, Minutes, two years 99th, Starts 83rd, Minutes, last 365 days 98th, European club minutes 92nd45thGoals87thAssists99thMinutes83rdStarts98thRecent92ndEurope

Dashed ring: the midfielder median (50th percentile)

Minutes, two years

Total club minutes in the two-year window: how much the player was used.

7,447 this player2,607 midfielder median99th percentile

451peer deciles · median line · this player ●9,624

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
Feb 2013
Peak
€80M
Jun 2024
Model target
€50M
May 2026
Valuations
37
4 club changes
May 2026€50MInter MilanValuation the model is trained to reproduce

May 2026: €50M, Inter Milan. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2013-02-25€50kCagliari Primavera
2013-04-29€150kCagliari Primavera
2013-10-30€200kCagliari Primavera
2014-05-08€200kCagliari Primavera
2015-01-07€500kCagliari Calcio
2015-06-30€800kCagliari Calcio
2015-12-28€800kCagliari Calcio
2016-06-13€1.3MCalcio Como
2016-10-14€1.8MCagliari Calcio
2017-01-02€2.5MCagliari Calcio
2017-03-28€4MCagliari Calcio
2017-06-08€5MCagliari Calcio
2017-10-13€8MCagliari Calcio
2017-12-29€15MCagliari Calcio
2018-03-24€20MCagliari Calcio
2018-06-07€25MCagliari Calcio
2018-10-12€30MCagliari Calcio
2018-12-20€30MCagliari Calcio
2019-06-06€36MCagliari Calcio
2019-12-12€45MInter Milan
2020-04-08€36MInter Milan
2020-08-25€50MInter Milan
2020-12-29€55MInter Milan
2021-03-23€60MInter Milan
2021-05-25€65MInter Milan
2021-12-28€70MInter Milan
2022-06-07€70MInter Milan
2022-11-11€70MInter Milan
2023-06-15€75MInter Milan
2023-12-20€75MInter Milan
2024-06-05€80MInter Milan
2024-12-18€80MInter Milan
2025-06-17€75MInter Milan
2025-10-07€65MInter Milan
2025-12-23€60MInter Milan
2026-03-24€50MInter Milan
2026-05-29€50MInter Milan

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
+0.361

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

Joint 6th highest observed value among 507 Serie A players.

€100k€750k€5M€30M€50MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 97% of the 1,687 midfielders.

€20k€200k€2M€20M€50MSee them in the Explorer →

Where Barella 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).