Xander
Blomme
DMBelgium · Go Ahead Eagles
Player dossierEredivisie
XanderBlomme
DMDefensive MidfieldMidfield
- Club
- Go Ahead Eagles
- League
- Eredivisie
- Nationality
- Belgium
- Age
- 23
- Height
- 173 cm
- Foot
- Right
- Valued
- 2 Dec 2025
EredivisieReading the valuation
The market values Blomme at €300k. Model A, which never saw Blomme during training, estimates €491k: the market value is 39% below that estimate.
That is a factor of ×1.64. 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 €515k, 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
- 13
- Minutes
- 690
- Goals
- 0
- Assists
- 0
- Started
- 7/13
- Min / app
- 53
- Cards
- 3Y 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 Blomme…
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 €300k
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.
1% this player0% midfielder median61st 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
- €200k
- Oct 2020
- Peak
- €550k
- May 2024
- Model target
- €300k
- Dec 2025
- Valuations
- 10
- 3 club changes
Dec 2025: €300k, Go Ahead Eagles. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-10-21 | €200k | Club NXT |
| 2021-02-23 | €250k | Club NXT |
| 2022-11-11 | €250k | Go Ahead Eagles |
| 2023-06-23 | €350k | Go Ahead Eagles |
| 2023-12-15 | €300k | Go Ahead Eagles |
| 2024-03-18 | €500k | Go Ahead Eagles |
| 2024-05-31 | €550k | Go Ahead Eagles |
| 2024-12-10 | €500k | Excelsior Rotterdam |
| 2025-06-09 | €450k | Excelsior Rotterdam |
| 2025-12-02 | €300k | Go Ahead Eagles |
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
- −0.493
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 8% of the 425 Eredivisie players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 7% of the 1,687 midfielders.
See them in the Explorer →Where Blomme appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- HoltbyCMNAC Breda · Eredivisie€300k
- LinssenCFNEC Nijmegen · Eredivisie€300k
- NauberCBGo Ahead Eagles · Eredivisie€300k
- ViergeverCBFC Utrecht · Eredivisie€300k
- TrejoAMRayo Vallecano · midfielders€300k
- PizziAMGD Estoril Praia · midfielders€300k
- SchwabCMHolstein Kiel · midfielders€300k
- KalitvintsevAMMetalist 1925 Kharkiv · midfielders€300k
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).