Karamba
Gassama
CMThe Gambia · Gaziantep FK
Player dossierSüper Lig
KarambaGassama
CMCentral MidfieldMidfield
- Club
- Gaziantep FK
- League
- Süper Lig
- Nationality
- The Gambia
- Age
- 21
- Height
- 185 cm
- Foot
- Right
- Valued
- 21 May 2026
Süper LigReading the valuation
The market values Gassama at €500k. Model A, which never saw Gassama during training, estimates €1.4M: the market value is 64% below that estimate.
That is a factor of ×2.78. 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 €3.3M, 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
- 20
- Minutes
- 915
- Goals
- 0
- Assists
- 1
- Started
- 10/20
- Min / app
- 46
- 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 Gassama…
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 €500k
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.
39% this player0% midfielder median99th 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
- €150k
- May 2023
- Peak
- €500k
- May 2026
- Model target
- €500k
- May 2026
- Valuations
- 10
- 2 club changes
May 2026: €500k, Gaziantep FK. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2023-05-16 | €150k | FK Dinamo |
| 2023-10-26 | €100k | FC Dinamo City |
| 2023-12-29 | €100k | FC Dinamo City |
| 2024-05-27 | €100k | FC Dinamo City |
| 2024-11-15 | €250k | FC Dinamo City |
| 2025-03-25 | €275k | FC Dinamo City |
| 2025-05-30 | €275k | FC Dinamo City |
| 2025-12-30 | €250k | FC Dinamo City |
| 2026-03-05 | €300k | Gaziantep FK |
| 2026-05-21 | €500k | Gaziantep FK |
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
- −1.021
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 20% of the 428 Süper Lig players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 16% of the 1,687 midfielders.
See them in the Explorer →Where Gassama appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- GünokGKFenerbahce · Süper Lig€500k
- StreekAMAntalyaspor · Süper Lig€500k
- TürüçRWKonyaspor · Süper Lig€500k
- JovanovicGKKocaelispor · Süper Lig€500k
- MilnerCMBrighton & Hove Albion · midfielders€500k
- MoutinhoCMSC Braga · midfielders€500k
- HöflerDMSC Freiburg · midfielders€500k
- StepanenkoDMKolos Kovalivka · midfielders€500k
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).