Alessio

Romagnoli

CBItaly · SS Lazio

№ 197747Established €5.9M +0.01

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Image: FootyLogos

Player dossierSerie A

AlessioRomagnoli

CBCentre-BackDefender

Club: SS Lazio
League: Serie A
Nationality: Italy
Age: 31
Height: 185 cm
Foot: Left
Valued: 29 May 2026

Reading the valuation

The market values Romagnoli at €6M. Model A, which never saw Romagnoli during training, estimates €5.9M: the market value is 1% above that estimate.

That is a factor of ×1.01. 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 €6.3M, 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.

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: 79
Minutes: 6,635
Goals: 6
Assists: 1
Started: 76/79
Min / app: 84
Cards: 11Y 2R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Romagnoli…

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 €6M

Checking API

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

Dashed ring: the defender median (50th percentile)

Minutes, two years

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

6,635 this player2,860 defender median96th percentile

451peer deciles · median line · this player ●9,111

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: €75k; Nov 2011
Peak: €50M; Mar 2019
Model target: €6M; May 2026
Valuations: 40; 5 club changes

May 2026€6MSS LazioValuation the model is trained to reproduce

May 2026: €6M, SS Lazio. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table

Date	Market value	Club
2011-11-23	€75k	Roma U19
2012-03-25	€75k	Roma U19
2012-06-06	€100k	Roma U19
2013-01-14	€500k	AS Roma
2013-06-19	€900k	AS Roma
2014-01-07	€900k	AS Roma
2014-03-10	€1.5M	AS Roma
2014-07-01	€3M	AS Roma
2014-11-08	€4M	UC Sampdoria
2015-01-07	€6.5M	UC Sampdoria
2015-07-01	€8.5M	AS Roma
2015-09-23	€15M	AC Milan
2016-01-04	€18M	AC Milan
2016-07-15	€18M	AC Milan
2016-10-14	€20M	AC Milan
2017-01-02	€25M	AC Milan
2017-06-08	€25M	AC Milan
2017-12-29	€25M	AC Milan
2018-03-24	€35M	AC Milan
2018-06-07	€40M	AC Milan
2018-12-20	€40M	AC Milan
2019-03-01	€50M	AC Milan
2019-06-06	€50M	AC Milan
2019-12-12	€45M	AC Milan
2020-04-08	€36M	AC Milan
2020-08-25	€36M	AC Milan
2020-12-29	€36M	AC Milan
2021-03-23	€30M	AC Milan
2021-06-03	€25M	AC Milan
2021-10-14	€20M	AC Milan
2021-12-28	€20M	AC Milan
2022-06-07	€17M	AC Milan
2022-11-11	€18M	SS Lazio
2023-06-15	€18M	SS Lazio
2023-12-20	€15M	SS Lazio
2024-06-05	€15M	SS Lazio
2024-12-18	€12M	SS Lazio
2025-06-17	€7M	SS Lazio
2025-12-23	€7M	SS Lazio
2026-05-29	€6M	SS Lazio

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: +0.010

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

Valued above 50% of the 507 Serie A players.

See them in the Explorer →

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

Valued above 73% of the 2,065 defenders.

See them in the Explorer →

Where Romagnoli appears

TerminalSerie A in the Player Explorer
TerminalSerie A on the League Landscape

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).