Ian
Maatsen
LBNetherlands · Aston Villa
Image: FootyLogos
Player dossierPremier League
IanMaatsen
LBLeft-BackDefender
- Club
- Aston Villa
- League
- Premier League
- Nationality
- Netherlands
- Age
- 24
- Height
- 178 cm
- Foot
- Left
- Valued
- 3 Jun 2026
Premier LeagueReading the valuation
The market values Maatsen at €30M. Model A, which never saw Maatsen during training, estimates €30.6M: the market value is 2% below that estimate.
That is a factor of ×1.02. 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 €24M, 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
- 86
- Minutes
- 4,039
- Goals
- 3
- Assists
- 4
- Started
- 40/86
- Min / app
- 47
- Cards
- 6Y 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 Maatsen…
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 €30M
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 2,065 defenders
Dashed ring: the defender median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
23% this player0% defender median88th 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
- €1M
- Nov 2021
- Peak
- €40M
- May 2024
- Model target
- €30M
- Jun 2026
- Valuations
- 16
- 5 club changes
Jun 2026: €30M, Aston Villa. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-11-24 | €1M | Coventry City |
| 2022-05-13 | €5M | Coventry City |
| 2022-09-14 | €7M | Burnley FC |
| 2022-10-27 | €9M | Burnley FC |
| 2023-06-01 | €12M | Chelsea FC U21 |
| 2023-10-09 | €20M | Chelsea FC |
| 2023-12-19 | €20M | Chelsea FC |
| 2024-03-27 | €30M | Borussia Dortmund |
| 2024-05-29 | €40M | Borussia Dortmund |
| 2024-12-16 | €32M | Aston Villa |
| 2025-03-18 | €28M | Aston Villa |
| 2025-05-30 | €28M | Aston Villa |
| 2025-10-17 | €25M | Aston Villa |
| 2025-12-09 | €25M | Aston Villa |
| 2026-03-09 | €30M | Aston Villa |
| 2026-06-03 | €30M | Aston Villa |
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
- −0.021
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 League555 players · median €18M
Valued above 73% of the 555 Premier League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 95% of the 2,065 defenders.
See them in the Explorer →Where Maatsen appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- TielemansCMAston Villa · Premier League€30M
- RayaGKArsenal FC · Premier League€30M
- BowenRWWest Ham United · Premier League€30M
- LigtCBManchester United · Premier League€30M
- WhiteRBArsenal FC · defenders€30M
- DalotRBManchester United · defenders€30M
- BuongiornoCBSSC Napoli · defenders€30M
- CollinsCBBrentford FC · defenders€30M
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).