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…

Portrait of Hakan Çalhanoğlu

Hakan

Çalhanoğlu

DMTürkiye · Inter Milan

№ 126414Elite €9.8M +0.49

Image: FootyLogos

Player dossierSerie A

HakanÇalhanoğlu

DMDefensive MidfieldMidfield

Club
Inter Milan
League
Serie A
Nationality
Türkiye
Age
32
Height
178 cm
Foot
Right
Valued
29 May 2026

Reading the valuation

The market values Çalhanoğlu at €16M. Model A, which never saw Çalhanoğlu during training, estimates €9.8M: the market value is 64% above that estimate.

That is a factor of ×1.64. 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 €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.

▲ +0.49A €9.8M▲ +1.38B €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
77
Minutes
5,218
Goals
23
Assists
15
Started
67/77
Min / app
68
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 Çalhanoğlu…

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 €16M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €16MModel A €9.8M

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 1,687 midfielders

Hakan Çalhanoğlu's percentiles among midfielders: Goals per 90 98th, Assists per 90 93rd, Minutes, two years 89th, Starts 82nd, Minutes, last 365 days 71st, European club minutes 88th98thGoals93rdAssists89thMinutes82ndStarts71stRecent88thEurope

Dashed ring: the midfielder median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.40 this player0.08 midfielder median98th percentile

0.00peer deciles · median line · this player ●0.93

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
€150k
Feb 2012
Peak
€45M
Jun 2024
Model target
€16M
May 2026
Valuations
43
4 club changes
May 2026€16MInter MilanValuation the model is trained to reproduce

May 2026: €16M, Inter Milan. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2012-02-06€150kKarlsruher SC
2012-03-05€300kKarlsruher SC
2012-06-24€1MKarlsruher SC
2012-08-26€2MKarlsruher SC
2012-10-23€2.5MKarlsruher SC
2013-06-28€3MKarlsruher SC
2013-11-05€4MHamburger SV
2014-02-12€7MHamburger SV
2014-07-10€12MBayer 04 Leverkusen
2014-08-21€15MBayer 04 Leverkusen
2015-02-04€18MBayer 04 Leverkusen
2015-07-01€18MBayer 04 Leverkusen
2016-02-15€18MBayer 04 Leverkusen
2016-06-01€18MBayer 04 Leverkusen
2016-07-22€18MBayer 04 Leverkusen
2017-02-07€20MBayer 04 Leverkusen
2017-06-19€20MBayer 04 Leverkusen
2017-12-29€17.5MAC Milan
2018-03-24€22MAC Milan
2018-06-07€27MAC Milan
2018-12-20€22MAC Milan
2019-06-06€20MAC Milan
2019-10-08€18MAC Milan
2019-12-12€18MAC Milan
2020-04-08€14.5MAC Milan
2020-08-25€23MAC Milan
2020-10-29€30MAC Milan
2020-12-29€35MAC Milan
2021-05-25€35MAC Milan
2021-10-14€30MInter Milan
2021-12-28€35MInter Milan
2022-06-07€35MInter Milan
2022-11-11€35MInter Milan
2023-06-15€40MInter Milan
2023-12-20€40MInter Milan
2024-06-05€45MInter Milan
2024-12-18€40MInter Milan
2025-03-25€35MInter Milan
2025-06-17€30MInter Milan
2025-10-07€25MInter Milan
2025-12-23€22MInter Milan
2026-03-24€18MInter Milan
2026-05-29€16MInter 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
+0.492

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 79% of the 507 Serie A players.

€100k€750k€5M€30M€16MSee them in the Explorer →

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

Valued above 86% of the 1,687 midfielders.

€20k€200k€2M€20M€16MSee them in the Explorer →

Where Çalhanoğlu 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).