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…

Stije

Resink

DMNetherlands · FC Groningen

№ 793099Established €3.8M +0.62

Player dossierEredivisie

StijeResink

DMDefensive MidfieldMidfield

Club
FC Groningen
League
Eredivisie
Nationality
Netherlands
Age
23
Height
186 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Resink at €7M. Model A, which never saw Resink during training, estimates €3.8M: the market value is 85% above that estimate.

That is a factor of ×1.85. 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 €5.4M, 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.

▲ +0.62A €3.8M▲ +0.26B €5.4M
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
55
Minutes
4,641
Goals
11
Assists
7
Started
54/55
Min / app
84
Cards
12Y 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 Resink…

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 €3.8M

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

Stije Resink's percentiles among midfielders: Goals per 90 84th, Assists per 90 66th, Minutes, two years 83rd, Starts 98th, Minutes, last 365 days 70th, European club minutes 30th84thGoals66thAssists83rdMinutes98thStarts70thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

98% this player69% midfielder median98th percentile

7%peer deciles · median line · this player ●100%

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
€25k
Mar 2021
Peak
€7M
Dec 2025
Model target
€7M
May 2026
Valuations
17
2 club changes
May 2026€7MFC GroningenValuation the model is trained to reproduce

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

Show as a table
DateMarket valueClub
2021-03-16€25kAlmere City U18
2021-10-12€50kAlmere City FC
2022-01-12€50kAlmere City FC
2022-06-23€125kAlmere City FC
2022-10-12€300kAlmere City FC
2023-04-03€400kAlmere City FC
2023-07-04€550kAlmere City FC
2023-10-17€700kAlmere City FC
2023-12-15€850kAlmere City FC
2024-03-18€1MAlmere City FC
2024-05-31€1MAlmere City FC
2024-12-17€1MFC Groningen
2025-03-28€2MFC Groningen
2025-05-28€4MFC Groningen
2025-10-02€6MFC Groningen
2025-12-02€7MFC Groningen
2026-05-28€7MFC Groningen

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
+0.617

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 →

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

Valued above 71% of the 1,687 midfielders.

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

Where Resink 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).