Yaw
Ackah
DMGhana · Kayserispor
Player dossierSüper Lig
YawAckah
DMDefensive MidfieldMidfield
- Club
- Kayserispor
- League
- Süper Lig
- Nationality
- Ghana
- Age
- 26
- Height
- 175 cm
- Foot
- Right
- Valued
- 17 Dec 2025
Süper LigReading the valuation
The market values Ackah at €300k. Model A, which never saw Ackah during training, estimates €374k: the market value is 20% below that estimate.
That is a factor of ×1.25. 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 €756k, 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
- 34
- Minutes
- 884
- Goals
- 0
- Assists
- 0
- Started
- 7/34
- Min / app
- 26
- Cards
- 2Y 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 Ackah…
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.
0% this player0% midfielder median30th 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
- €300k
- Oct 2019
- Peak
- €900k
- Aug 2020
- Model target
- €300k
- Dec 2025
- Valuations
- 23
- 3 club changes
Dec 2025: €300k, Kayserispor. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-10-11 | €300k | Boavista FC |
| 2019-12-30 | €800k | Boavista FC |
| 2020-04-08 | €725k | Boavista FC |
| 2020-08-17 | €900k | Kayserispor |
| 2020-12-23 | €900k | Kayserispor |
| 2021-03-16 | €675k | Kayserispor |
| 2021-05-21 | €500k | Kayserispor |
| 2021-10-22 | €450k | Ankara Keciörengücü |
| 2022-01-17 | €425k | Ankara Keciörengücü |
| 2022-06-10 | €400k | Ankara Keciörengücü |
| 2022-10-27 | €550k | Kayserispor |
| 2023-03-14 | €400k | Kayserispor |
| 2023-06-08 | €450k | Kayserispor |
| 2023-09-27 | €650k | Kayserispor |
| 2023-12-21 | €600k | Kayserispor |
| 2024-03-15 | €600k | Kayserispor |
| 2024-05-31 | €550k | Kayserispor |
| 2024-10-04 | €400k | Kayserispor |
| 2024-12-23 | €400k | Kayserispor |
| 2025-03-20 | €325k | Kayserispor |
| 2025-06-18 | €325k | Kayserispor |
| 2025-10-01 | €300k | Kayserispor |
| 2025-12-17 | €300k | Kayserispor |
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
- −0.220
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 →Süper Lig428 players · median €1.2M
Valued above 12% of the 428 Süper Lig 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 Ackah appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- TosunCFKasimpasa · Süper Lig€300k
- MaximAMGaziantep FK · Süper Lig€300k
- YeşilyurtRBAntalyaspor · Süper Lig€300k
- MladenovicLBFatih Karagümrük · Süper Lig€300k
- TrejoAMRayo Vallecano · midfielders€300k
- HoltbyCMNAC Breda · midfielders€300k
- PizziAMGD Estoril Praia · midfielders€300k
- SchwabCMHolstein Kiel · 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).