FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Ahmetcan

Kaplan

CBTürkiye · NEC Nijmegen

№ 662131Established €5.9M +0.16

Player dossierEredivisie

AhmetcanKaplan

CBCentre-BackDefender

Club
NEC Nijmegen
League
Eredivisie
Nationality
Türkiye
Age
23
Height
189 cm
Foot
Left
Valued
28 May 2026

Reading the valuation

The market values Kaplan at €7M. Model A, which never saw Kaplan during training, estimates €5.9M: the market value is 18% above that estimate.

That is a factor of ×1.18. 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 €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.

▲ +0.16A €5.9M▲ +0.55B €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
42
Minutes
3,279
Goals
2
Assists
0
Started
36/42
Min / app
78
Cards
13Y 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 Kaplan…

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 €7M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €7MModel A €5.9M

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 2,065 defenders

Ahmetcan Kaplan's percentiles among defenders: Goals per 90 67th, Assists per 90 17th, Minutes, two years 58th, Starts 57th, Minutes, last 365 days 74th, European club minutes 67th67thGoals17thAssists58thMinutes57thStarts74thRecent67thEurope

Dashed ring: the defender median (50th percentile)

Minutes, last 365 days

Club minutes in the final year of the window: recent involvement, or the absence of it.

2,432 this player1,687 defender median74th percentile

0peer deciles · median line · this player ●4,941

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
Aug 2020
Peak
€10M
May 2024
Model target
€7M
May 2026
Valuations
19
3 club changes
May 2026€7MNEC NijmegenValuation the model is trained to reproduce

May 2026: €7M, NEC Nijmegen. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-08-04€50kTrabzonspor U19
2021-03-16€50kTrabzonspor
2021-05-21€50kTrabzonspor
2021-07-14€100kTrabzonspor
2021-10-12€250kTrabzonspor
2022-01-04€300kTrabzonspor
2022-03-31€1.4MTrabzonspor
2022-06-01€2.8MTrabzonspor
2022-09-14€5MAjax Amsterdam
2022-11-11€5MAjax Amsterdam
2023-06-23€5MAjax Amsterdam
2023-12-15€4MAjax Amsterdam
2024-03-18€7MAjax Amsterdam
2024-05-31€10MAjax Amsterdam
2024-10-14€8MAjax Amsterdam
2024-12-17€6MAjax Amsterdam
2025-05-28€5MAjax Amsterdam
2025-12-02€5MNEC Nijmegen
2026-05-28€7MNEC Nijmegen

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
+0.163

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 →

Eredivisie425 players · median €1M

Valued above 86% of the 425 Eredivisie players.

€75k€500k€3M€20M€7MSee them in the Explorer →

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

Valued above 76% of the 2,065 defenders.

€20k€200k€2M€20M€7MSee them in the Explorer →

Where Kaplan 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).