Ousseynou
Ba
CBSenegal · Basaksehir FK
Player dossierSüper Lig
OusseynouBa
CBCentre-BackDefender
- Club
- Basaksehir FK
- League
- Süper Lig
- Nationality
- Senegal
- Age
- 30
- Height
- 192 cm
- Foot
- Right
- Valued
- 21 May 2026
Süper LigReading the valuation
The market values Ba at €1.2M. Model A, which never saw Ba during training, estimates €1.9M: the market value is 38% below that estimate.
That is a factor of ×1.62. 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 €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
- 46
- Minutes
- 3,434
- Goals
- 0
- Assists
- 0
- Started
- 38/46
- Min / app
- 75
- Cards
- 16Y 1R
Club matches, two years to the valuation date
The Valuation Journey
What moves Model A
Asking the prediction API to explain Model A for Ba…
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 €1.2M
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.
20% this player0% defender median84th 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
- May 2018
- Peak
- €5M
- Feb 2021
- Model target
- €1.2M
- May 2026
- Valuations
- 22
- 2 club changes
May 2026: €1.2M, Basaksehir FK. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2018-05-16 | €300k | GFC Ajaccio |
| 2019-01-08 | €300k | GFC Ajaccio |
| 2019-06-27 | €500k | GFC Ajaccio |
| 2019-12-18 | €500k | Olympiacos Piraeus |
| 2020-04-08 | €400k | Olympiacos Piraeus |
| 2020-08-04 | €4M | Olympiacos Piraeus |
| 2021-02-12 | €5M | Olympiacos Piraeus |
| 2021-11-01 | €4.5M | Olympiacos Piraeus |
| 2022-06-09 | €4.5M | Olympiacos Piraeus |
| 2022-11-07 | €4M | Olympiacos Piraeus |
| 2023-05-22 | €3.5M | Olympiacos Piraeus |
| 2023-09-27 | €3.1M | Basaksehir FK |
| 2023-12-21 | €2.7M | Basaksehir FK |
| 2024-03-15 | €2.6M | Basaksehir FK |
| 2024-05-31 | €2.6M | Basaksehir FK |
| 2024-10-04 | €2.6M | Basaksehir FK |
| 2024-12-23 | €2.5M | Basaksehir FK |
| 2025-03-20 | €2.1M | Basaksehir FK |
| 2025-06-18 | €2M | Basaksehir FK |
| 2025-12-17 | €1.8M | Basaksehir FK |
| 2026-03-05 | €1.5M | Basaksehir FK |
| 2026-05-21 | €1.2M | Basaksehir 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
- −0.480
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 45% of the 428 Süper Lig players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 39% of the 2,065 defenders.
See them in the Explorer →Where Ba appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- YokuşluDMTrabzonspor · Süper Lig€1.2M
- ThiamCFEyüpspor · Süper Lig€1.2M
- StormLWAntalyaspor · Süper Lig€1.2M
- HajradinovicAMKasimpasa · Süper Lig€1.2M
- BlindCBGirona FC · defenders€1.2M
- CostaCB1.FSV Mainz 05 · defenders€1.2M
- AlonsoCBCelta de Vigo · defenders€1.2M
- LykogiannisLBBologna FC 1909 · defenders€1.2M
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).