Bert
Esselink
CBNetherlands · Dundee United FC
Player dossierPremiership
BertEsselink
CBCentre-BackDefender
- Club
- Dundee United FC
- League
- Premiership
- Nationality
- Netherlands
- Age
- 26
- Height
- 191 cm
- Foot
- Right
- Valued
- 20 May 2026
PremiershipReading the valuation
The market values Esselink at €350k. Model A, which never saw Esselink during training, estimates €547k: the market value is 36% below that estimate.
That is a factor of ×1.56. 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 €3.4M, 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
- 23
- Minutes
- 1,914
- Goals
- 1
- Assists
- 0
- Started
- 22/23
- Min / app
- 83
- Cards
- 4Y 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 Esselink…
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 €350k
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)
Starts
Share of appearances started rather than entered from the bench.
96% this player83% defender median86th 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
- Sept 2021
- Peak
- €600k
- Mar 2024
- Model target
- €350k
- May 2026
- Valuations
- 14
- 4 club changes
May 2026: €350k, Dundee United FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-09-29 | €50k | PAEEK Kyrenia |
| 2022-01-11 | €250k | APOEL Nicosia |
| 2022-06-20 | €300k | APOEL Nicosia |
| 2023-01-10 | €300k | Olympiakos Nicosia |
| 2023-05-31 | €300k | Olympiakos Nicosia |
| 2023-10-06 | €450k | Stal Mielec |
| 2023-12-29 | €500k | Stal Mielec |
| 2024-03-28 | €600k | Stal Mielec |
| 2024-06-07 | €500k | Stal Mielec |
| 2024-12-09 | €400k | Stal Mielec |
| 2025-04-03 | €300k | Stal Mielec |
| 2025-05-28 | €300k | Stal Mielec |
| 2025-12-10 | €350k | Dundee United FC |
| 2026-05-20 | €350k | Dundee United FC |
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
- −0.446
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 →Premiership311 players · median €400k
Valued above 45% of the 311 Premiership players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 12% of the 2,065 defenders.
See them in the Explorer →Where Esselink appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- McCartCBHeart of Midlothian FC · Premiership€350k
- LyonsCMKilmarnock FC · Premiership€350k
- NlunduluCFSt. Mirren FC · Premiership€350k
- Schjönning-LarsenLBKilmarnock FC · Premiership€350k
- GodeauCBSK Beveren · defenders€350k
- CroneRBFC Fredericia · defenders€350k
- SarrRBFC Metz · defenders€350k
- MalyshCBIngulets Petrove · defenders€350k
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).