Joseph
Aidoo
CBGhana · Celta de Vigo
Player dossierLaLiga
JosephAidoo
CBCentre-BackDefender
- Club
- Celta de Vigo
- League
- LaLiga
- Nationality
- Ghana
- Age
- 30
- Height
- 181 cm
- Foot
- Right
- Valued
- 5 Jun 2026
LaLigaReading the valuation
The market values Aidoo at €1M. Model A, which never saw Aidoo during training, estimates €2.1M: the market value is 52% below that estimate.
That is a factor of ×2.08. 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 €736k, closer to the market here, although it is usually further off (typical miss ×2.07).
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 23
- Minutes
- 1,619
- Goals
- 0
- Assists
- 0
- Started
- 18/23
- Min / app
- 70
- Cards
- 0Y 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 Aidoo…
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 €1M
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.
8% this player0% defender median70th 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
- €75k
- Aug 2015
- Peak
- €8M
- Sept 2019
- Model target
- €1M
- Jun 2026
- Valuations
- 33
- 4 club changes
Jun 2026: €1M, Celta de Vigo. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2015-08-16 | €75k | Hammarby IF |
| 2015-11-29 | €75k | Hammarby IF |
| 2016-06-17 | €75k | Hammarby IF |
| 2016-12-11 | €250k | Hammarby IF |
| 2017-06-20 | €500k | Hammarby IF |
| 2017-10-20 | €1M | KRC Genk |
| 2018-01-09 | €2M | KRC Genk |
| 2018-03-30 | €2.5M | KRC Genk |
| 2018-06-03 | €3M | KRC Genk |
| 2018-09-11 | €4M | KRC Genk |
| 2018-12-27 | €4M | KRC Genk |
| 2019-06-10 | €4M | KRC Genk |
| 2019-09-10 | €8M | Celta de Vigo |
| 2019-12-20 | €8M | Celta de Vigo |
| 2020-04-08 | €6.5M | Celta de Vigo |
| 2020-10-08 | €7M | Celta de Vigo |
| 2021-01-05 | €7M | Celta de Vigo |
| 2021-06-10 | €6M | Celta de Vigo |
| 2021-10-13 | €5M | Celta de Vigo |
| 2021-12-30 | €5M | Celta de Vigo |
| 2022-06-03 | €7M | Celta de Vigo |
| 2022-11-07 | €7M | Celta de Vigo |
| 2023-03-23 | €8M | Celta de Vigo |
| 2023-06-13 | €8M | Celta de Vigo |
| 2023-10-13 | €6M | Celta de Vigo |
| 2023-12-22 | €4M | Celta de Vigo |
| 2024-06-07 | €4M | Celta de Vigo |
| 2024-10-11 | €3M | Celta de Vigo |
| 2024-12-27 | €2M | Celta de Vigo |
| 2025-03-21 | €1.4M | Real Valladolid CF |
| 2025-06-09 | €1.2M | Real Valladolid CF |
| 2025-12-12 | €1M | Celta de Vigo |
| 2026-06-05 | €1M | Celta de Vigo |
Audit context group-level, not about this player
- Audit group
- non-UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- −0.733
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 →Defenders, all leagues2,065 players · median €2M
Valued above 35% of the 2,065 defenders.
See them in the Explorer →Where Aidoo appears
- TerminalLaLiga in the Player Explorer
- TerminalLaLiga 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
- AzpilicuetaCBSevilla FC · LaLiga€1M
- ParejoCMVillarreal CF · LaLiga€1M
- BerchicheLBAthletic Bilbao · LaLiga€1M
- BalliuRBRayo Vallecano · LaLiga€1M
- OtamendiCBSL Benfica · defenders€1M
- KaravaevRBDynamo Kyiv · defenders€1M
- MandiCBLOSC Lille · defenders€1M
- VestergaardCBLeicester City · defenders€1M
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).