Luuk
Koopmans
GKNetherlands · Fortuna Sittard
Player dossierEredivisie
LuukKoopmans
GKGoalkeeperGoalkeeper
- Club
- Fortuna Sittard
- League
- Eredivisie
- Nationality
- Netherlands
- Age
- 32
- Height
- 190 cm
- Foot
- Right
- Valued
- 28 May 2026
Reading the valuation
The market values Koopmans at €200k. Model A, which never saw Koopmans during training, estimates €263k: the market value is 24% below that estimate.
That is a factor of ×1.32. 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 €424k, 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.
- Apps
- 18
- Minutes
- 1,620
- Started
- 18/18
- Min / app
- 90
- Cards
- 2Y 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 Koopmans…
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 €200k
Checking APIAsking 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
Dashed ring: the goalkeeper median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
100% this player100% goalkeeper median62nd percentile
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 2012
- Peak
- €600k
- Dec 2019
- Model target
- €200k
- May 2026
- Valuations
- 32
- 4 club changes
May 2026: €200k, Fortuna Sittard. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-08-02 | €50k | FC Oss |
| 2013-06-04 | €50k | FC Oss |
| 2014-02-10 | €50k | FC Oss |
| 2014-08-16 | €50k | FC Oss |
| 2015-02-21 | €100k | FC Oss |
| 2015-07-27 | €200k | PSV Eindhoven |
| 2016-02-05 | €200k | PSV Eindhoven |
| 2016-07-01 | €300k | PSV Eindhoven |
| 2017-01-18 | €200k | PSV Eindhoven |
| 2017-06-07 | €200k | PSV Eindhoven |
| 2018-01-17 | €200k | PSV Eindhoven |
| 2018-06-12 | €200k | PSV Eindhoven |
| 2019-01-21 | €300k | MVV Maastricht |
| 2019-03-23 | €350k | MVV Maastricht |
| 2019-06-27 | €350k | MVV Maastricht |
| 2019-12-18 | €600k | ADO Den Haag |
| 2020-04-08 | €475k | ADO Den Haag |
| 2020-10-14 | €475k | ADO Den Haag |
| 2021-01-06 | €500k | ADO Den Haag |
| 2021-03-09 | €400k | ADO Den Haag |
| 2021-05-19 | €400k | ADO Den Haag |
| 2021-10-12 | €350k | ADO Den Haag |
| 2022-01-12 | €350k | ADO Den Haag |
| 2022-06-23 | €350k | ADO Den Haag |
| 2022-10-12 | €275k | ADO Den Haag |
| 2023-07-04 | €225k | Fortuna Sittard |
| 2023-12-15 | €200k | Fortuna Sittard |
| 2024-05-31 | €225k | Fortuna Sittard |
| 2024-12-17 | €200k | Fortuna Sittard |
| 2025-05-28 | €200k | Fortuna Sittard |
| 2025-12-02 | €150k | Fortuna Sittard |
| 2026-05-28 | €200k | Fortuna Sittard |
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
- −0.275
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 3% of the 425 Eredivisie players.
See them in the Explorer →Goalkeepers, all leagues485 players · median €1M
Valued above 9% of the 485 goalkeepers.
See them in the Explorer →Where Koopmans appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- WolfswinkelCFFC Twente Enschede · Eredivisie€200k
- NuytinckCBNEC Nijmegen · Eredivisie€200k
- ToornstraAMSparta Rotterdam · Eredivisie€200k
- WierikCBHeracles Almelo · Eredivisie€200k
- GorgelinGKRC Lens · goalkeepers€200k
- PesjakovGKKrylya Sovetov Samara · goalkeepers€200k
- ThoelenGKRoyal Antwerp FC · goalkeepers€200k
- DarlowGKLeeds United · goalkeepers€200k
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).