Derek
Agyakwa
CBNetherlands · Volos NFC
Player dossierSuper League
DerekAgyakwa
CBCentre-BackDefender
- Club
- Volos NFC
- League
- Super League
- Nationality
- Netherlands
- Age
- 24
- Height
- 190 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Super LeagueReading the valuation
The market values Agyakwa at €450k. Model A, which never saw Agyakwa during training, estimates €529k: the market value is 15% below that estimate.
That is a factor of ×1.18. 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 €1.2M, 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
- 7
- Minutes
- 561
- Goals
- 1
- Assists
- 0
- Started
- 5/7
- Min / app
- 80
- 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 Agyakwa…
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 €450k
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.
70% this player0% defender median100th 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
- €100k
- Mar 2021
- Peak
- €500k
- Dec 2025
- Model target
- €450k
- Jun 2026
- Valuations
- 10
- 3 club changes
Jun 2026: €450k, Volos NFC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-03-10 | €100k | Watford FC U23 |
| 2022-07-29 | €100k | Port Vale FC |
| 2023-04-05 | €100k | Port Vale FC |
| 2023-06-09 | €100k | Port Vale FC |
| 2024-05-22 | €175k | Iberia 1999 Tbilisi |
| 2024-09-25 | €250k | Iberia 1999 Tbilisi |
| 2024-12-23 | €250k | Iberia 1999 Tbilisi |
| 2025-05-26 | €450k | Iberia 1999 Tbilisi |
| 2025-12-19 | €500k | Iberia 1999 Tbilisi |
| 2026-06-04 | €450k | Volos NFC |
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
- −0.163
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 →Super League356 players · median €600k
Valued above 35% of the 356 Super League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 17% of the 2,065 defenders.
See them in the Explorer →Where Agyakwa appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- MagnússonCBLevadiakos · Super League€450k
- OzegovicCFLevadiakos · Super League€450k
- DeligiannidisRBAsteras Aktor · Super League€450k
- KotsarisGKPanathinaikos · Super League€450k
- CresswellLBStoke City · defenders€450k
- GrétarssonCBSönderjyske Fodbold · defenders€450k
- JohanssonCBHolstein Kiel · defenders€450k
- VlietinckRBOud-Heverlee Leuven · defenders€450k
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).