Arthur
Vermeeren
DMBelgium · Olympique Marseille
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Image: FootyLogos
Player dossierLigue 1
ArthurVermeeren
DMDefensive MidfieldMidfield
- Club
- Olympique Marseille
- League
- Ligue 1
- Nationality
- Belgium
- Age
- 21
- Height
- 180 cm
- Foot
- Right
- Valued
- 1 Jun 2026
Ligue 1Reading the valuation
The market values Vermeeren at €20M. Model A, which never saw Vermeeren during training, estimates €16.2M: the market value is 24% above that estimate.
That is a factor of ×1.24. 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 €12.5M, 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
- 64
- Minutes
- 3,406
- Goals
- 0
- Assists
- 4
- Started
- 40/64
- Min / app
- 53
- Cards
- 9Y 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 Vermeeren…
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 €20M
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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
20% this player0% midfielder median84th 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
- €150k
- Jul 2022
- Peak
- €30M
- Dec 2023
- Model target
- €20M
- Jun 2026
- Valuations
- 14
- 3 club changes
Jun 2026: €20M, Olympique Marseille. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-07-20 | €150k | Royal Antwerp FC |
| 2022-09-07 | €400k | Royal Antwerp FC |
| 2022-11-04 | €500k | Royal Antwerp FC |
| 2023-03-22 | €8.5M | Royal Antwerp FC |
| 2023-06-09 | €17M | Royal Antwerp FC |
| 2023-10-23 | €25M | Royal Antwerp FC |
| 2023-12-19 | €30M | Royal Antwerp FC |
| 2024-06-07 | €25M | Atlético de Madrid |
| 2024-12-20 | €25M | RB Leipzig |
| 2025-03-27 | €22M | RB Leipzig |
| 2025-06-05 | €22M | RB Leipzig |
| 2025-12-15 | €28M | Olympique Marseille |
| 2026-03-27 | €22M | Olympique Marseille |
| 2026-06-01 | €20M | Olympique Marseille |
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
- +0.214
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 →Ligue 1423 players · median €5M
Valued above 85% of the 423 Ligue 1 players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 88% of the 1,687 midfielders.
See them in the Explorer →Where Vermeeren appears
- TerminalLigue 1 in the Player Explorer
- TerminalLigue 1 on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SarrCBRC Lens · Ligue 1€20M
- WeahRMOlympique Marseille · Ligue 1€20M
- SulcAMOlympique Lyon · Ligue 1€20M
- AblineCFFC Nantes · Ligue 1€20M
- GarcíaCMBayer 04 Leverkusen · midfielders€20M
- MaddisonAMTottenham Hotspur · midfielders€20M
- SchoutenDMPSV Eindhoven · midfielders€20M
- BentancurDMTottenham Hotspur · midfielders€20M
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).