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…

Davy

Roef

GKBelgium · KAA Gent

№ 140808Established €2.3M +0.08

Player dossierPro League

DavyRoef

GKGoalkeeperGoalkeeper

Club
KAA Gent
League
Pro League
Nationality
Belgium
Age
32
Height
187 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Roef at €2.5M. Model A, which never saw Roef during training, estimates €2.3M: the market value is 8% above that estimate.

That is a factor of ×1.08. 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 €2.5M, 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.

▲ +0.08A €2.3M▲ +0.01B €2.5M
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
71
Minutes
6,420
Started
71/71
Min / app
90
Cards
1Y 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 Roef…

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 €2.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2.5MModel A €2.3M

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 485 goalkeepers

Davy Roef's percentiles among goalkeepers: Minutes, two years 89th, Starts 62nd, Minutes, last 365 days 93rd, European club minutes 70th89thMinutes62ndStarts93rdRecent70thEurope

Dashed ring: the goalkeeper median (50th percentile)

Minutes, last 365 days

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

3,600 this player1,560 goalkeeper median93rd percentile

0peer deciles · median line · this player ●4,970

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
€100k
Jul 2011
Peak
€2.5M
Sept 2022
Model target
€2.5M
Jun 2026
Valuations
36
5 club changes
Jun 2026€2.5MKAA GentValuation the model is trained to reproduce

Jun 2026: €2.5M, KAA Gent. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2011-07-11€100kRSC Anderlecht U21
2013-06-25€100kRSC Anderlecht
2014-02-10€300kRSC Anderlecht
2014-06-28€300kRSC Anderlecht
2014-10-05€500kRSC Anderlecht
2015-01-07€1MRSC Anderlecht
2015-06-24€1.5MRSC Anderlecht
2016-02-07€1.5MRSC Anderlecht
2016-07-15€1.5MRSC Anderlecht
2016-10-20€2MRSC Anderlecht
2017-01-21€1.5MRSC Anderlecht
2017-06-05€1MDeportivo de La Coruña
2018-01-09€1.2MKVRS Waasland - SK Beveren
2018-06-03€1.2MKVRS Waasland - SK Beveren
2018-09-11€1.7MKVRS Waasland - SK Beveren
2018-12-27€1.5MKVRS Waasland - SK Beveren
2019-06-10€1.2MKVRS Waasland - SK Beveren
2019-12-13€900kRSC Anderlecht
2020-04-08€725kRSC Anderlecht
2020-10-16€800kKAA Gent
2021-06-07€600kKAA Gent
2022-01-06€500kKAA Gent
2022-04-12€800kKAA Gent
2022-05-26€1.5MKAA Gent
2022-09-07€2.5MKAA Gent
2022-11-04€2.5MKAA Gent
2023-03-22€2MKAA Gent
2023-06-09€1.5MKAA Gent
2023-12-19€1.8MKAA Gent
2024-03-22€1.5MKAA Gent
2024-06-04€1.5MKAA Gent
2024-10-02€2MKAA Gent
2024-12-11€2.5MKAA Gent
2025-06-12€2.5MKAA Gent
2025-12-10€2.5MKAA Gent
2026-06-04€2.5MKAA Gent

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
+0.079

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 →

Pro League350 players · median €1.8M

Valued above 60% of the 350 Pro League players.

€100k€750k€5M€30M€2.5MSee them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 64% of the 485 goalkeepers.

€20k€200k€2M€20M€2.5MSee them in the Explorer →

Where Roef 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).