FairValue

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

Rota

RBGreece · AEK Athens

№ 483916Established €5.8M −0.25

Player dossierSuper League

LazarosRota

RBRight-BackDefender

Club
AEK Athens
League
Super League
Nationality
Greece
Age
28
Height
180 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Rota at €4.5M. Model A, which never saw Rota during training, estimates €5.8M: the market value is 22% below that estimate.

That is a factor of ×1.28. 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 €4.7M, 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.

▼ −0.25A €5.8M▼ −0.05B €4.7M
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
60
Minutes
5,022
Goals
0
Assists
9
Started
57/60
Min / app
84
Cards
14Y 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 Rota…

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 €4.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €4.5MModel A €5.8M

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

Lazaros Rota's percentiles among defenders: Goals per 90 18th, Assists per 90 90th, Minutes, two years 83rd, Starts 84th, Minutes, last 365 days 84th, European club minutes 80th18thGoals90thAssists83rdMinutes84thStarts84thRecent80thEurope

Dashed ring: the defender median (50th percentile)

Assists per 90

Club assists per 90 minutes in the same window.

0.16 this player0.04 defender median90th percentile

0.00peer deciles · median line · this player ●0.58

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
€175k
Dec 2018
Peak
€4.5M
Jun 2026
Model target
€4.5M
Jun 2026
Valuations
17
2 club changes
Jun 2026€4.5MAEK AthensValuation the model is trained to reproduce

Jun 2026: €4.5M, AEK Athens. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2018-12-30€175kZemplin Michalovce
2019-06-25€300kZemplin Michalovce
2019-12-15€300kZemplin Michalovce
2020-10-14€300kFortuna Sittard
2021-01-06€550kFortuna Sittard
2021-05-19€550kFortuna Sittard
2021-11-01€700kAEK Athens
2022-06-09€1MAEK Athens
2022-11-07€1.2MAEK Athens
2023-02-27€1.8MAEK Athens
2023-05-22€1.8MAEK Athens
2023-12-20€2MAEK Athens
2024-05-30€2MAEK Athens
2024-12-18€3MAEK Athens
2025-05-23€3MAEK Athens
2025-12-12€4MAEK Athens
2026-06-04€4.5MAEK Athens

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
−0.245

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 →

Super League356 players · median €600k

Valued above 92% of the 356 Super League players.

€20k€150k€1M€7.5M€4.5MSee them in the Explorer →

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

Valued above 69% of the 2,065 defenders.

€20k€200k€2M€20M€4.5MSee them in the Explorer →

Where Rota 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).