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…

Ilya

Gadzhuk

CMUkraine · Ingulets Petrove

№ 771911Emerging €169k −0.12

Player dossierPremier Liha

IlyaGadzhuk

CMCentral MidfieldMidfield

Club
Ingulets Petrove
League
Premier Liha
Nationality
Ukraine
Age
23
Height
183 cm
Foot
–
Valued
18 Dec 2025

Reading the valuation

The market values Gadzhuk at €150k. Model A, which never saw Gadzhuk during training, estimates €169k: the market value is 11% below that estimate.

That is a factor of ×1.12. 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 €362k, 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.

▼ −0.12A €169k▼ −0.88B €362k
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
15
Minutes
532
Goals
0
Assists
0
Started
5/15
Min / app
35
Cards
3Y 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 Gadzhuk…

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 €150k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €150kModel A €169k

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

Ilya Gadzhuk's percentiles among midfielders: Goals per 90 10th, Assists per 90 8th, Minutes, two years 2nd, Starts 6th, Minutes, last 365 days 12th, European club minutes 30th10thGoals8thAssists2ndMinutes6thStarts12thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

0% this player0% midfielder median30th percentile

0%peer deciles · median line · this player ●85%

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
Jan 2021
Peak
€150k
Mar 2025
Model target
€150k
Dec 2025
Valuations
8
2 club changes
Dec 2025€150kIngulets PetroveValuation the model is trained to reproduce

Dec 2025: €150k, Ingulets Petrove. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2021-01-14€50kVorskla Poltava II
2022-07-01€50kDynamo Kyiv U19
2023-12-11€50kIngulets Petrove
2024-06-06€100kIngulets Petrove
2024-12-17€100kIngulets Petrove
2025-03-21€150kIngulets Petrove
2025-06-10€100kIngulets Petrove
2025-12-18€150kIngulets Petrove

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
−0.118

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 →

Premier Liha414 players · median €400k

Valued above 4% of the 414 Premier Liha players.

€50k€200k€1M€5M€150kSee them in the Explorer →

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

Valued above 2% of the 1,687 midfielders.

€20k€200k€2M€20M€150kSee them in the Explorer →

Where Gadzhuk 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).