Ismail
Jakobs
LBSenegal · Galatasaray
Image: FootyLogos
Player dossierSüper Lig
IsmailJakobs
LBLeft-BackDefender
- Club
- Galatasaray
- League
- Süper Lig
- Nationality
- Senegal
- Age
- 26
- Height
- 184 cm
- Foot
- Left
- Valued
- 21 May 2026
Süper LigReading the valuation
The market values Jakobs at €8M. Model A, which never saw Jakobs during training, estimates €8.9M: the market value is 10% below that estimate.
That is a factor of ×1.12. 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 €5.2M, 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
- 59
- Minutes
- 3,804
- Goals
- 0
- Assists
- 3
- Started
- 44/59
- Min / app
- 64
- Cards
- 6Y 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 Jakobs…
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 €8M
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.
30% this player0% defender median95th 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
- Feb 2018
- Peak
- €8M
- Dec 2023
- Model target
- €8M
- May 2026
- Valuations
- 24
- 4 club changes
May 2026: €8M, Galatasaray. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2018-02-03 | €50k | 1.FC Köln U19 |
| 2018-07-15 | €50k | 1.FC Köln II |
| 2019-02-05 | €50k | 1.FC Köln II |
| 2019-07-15 | €100k | 1.FC Köln |
| 2019-12-17 | €800k | 1.FC Köln |
| 2020-02-11 | €3M | 1.FC Köln |
| 2020-04-08 | €2.7M | 1.FC Köln |
| 2020-07-08 | €5M | 1.FC Köln |
| 2021-02-10 | €5M | 1.FC Köln |
| 2021-03-31 | €7M | 1.FC Köln |
| 2021-06-09 | €7M | 1.FC Köln |
| 2021-12-16 | €7M | AS Monaco |
| 2022-05-30 | €7M | AS Monaco |
| 2022-11-02 | €7M | AS Monaco |
| 2023-06-27 | €6M | AS Monaco |
| 2023-12-18 | €8M | AS Monaco |
| 2024-06-03 | €8M | AS Monaco |
| 2024-10-04 | €8M | Galatasaray |
| 2024-12-23 | €8M | Galatasaray |
| 2025-03-20 | €7M | Galatasaray |
| 2025-06-18 | €7M | Galatasaray |
| 2025-12-17 | €6M | Galatasaray |
| 2026-03-05 | €8M | Galatasaray |
| 2026-05-21 | €8M | Galatasaray |
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
- −0.110
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 91% of the 428 Süper Lig players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 78% of the 2,065 defenders.
See them in the Explorer →Where Jakobs appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- NdidiDMBesiktas JK · Süper Lig€8M
- DennisDMGöztepe · Süper Lig€8M
- CernyRWBesiktas JK · Süper Lig€7M
- TaliscaAMFenerbahce · Süper Lig€7M
- LaporteCBAthletic Bilbao · defenders€8M
- MaguireCBManchester United · defenders€8M
- CanceloRBFC Barcelona · defenders€8M
- ShawLBManchester United · defenders€8M
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).