Saïdou
Sow
CBGuinea · RC Strasbourg Alsace
Player dossierLigue 1
SaïdouSow
CBCentre-BackDefender
- Club
- RC Strasbourg Alsace
- League
- Ligue 1
- Nationality
- Guinea
- Age
- 23
- Height
- 187 cm
- Foot
- Right
- Valued
- 15 Dec 2025
Ligue 1Reading the valuation
The market values Sow at €3M. Model A, which never saw Sow during training, estimates €4.6M: the market value is 34% below that estimate.
That is a factor of ×1.52. 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 €1M, 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
- 31
- Minutes
- 2,536
- Goals
- 1
- Assists
- 2
- Started
- 28/31
- Min / app
- 82
- Cards
- 5Y 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 Sow…
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 €3M
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)
Starts
Share of appearances started rather than entered from the bench.
90% this player83% defender median70th 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
- €200k
- Oct 2020
- Peak
- €6M
- Dec 2024
- Model target
- €3M
- Dec 2025
- Valuations
- 18
- 3 club changes
Dec 2025: €3M, RC Strasbourg Alsace. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-10-15 | €200k | AS Saint-Étienne |
| 2021-01-07 | €500k | AS Saint-Étienne |
| 2021-04-09 | €1.5M | AS Saint-Étienne |
| 2021-06-04 | €2.5M | AS Saint-Étienne |
| 2021-10-08 | €4M | AS Saint-Étienne |
| 2021-12-16 | €4M | AS Saint-Étienne |
| 2022-05-30 | €4M | AS Saint-Étienne |
| 2022-10-28 | €3.5M | AS Saint-Étienne |
| 2023-04-06 | €3M | AS Saint-Étienne |
| 2023-06-16 | €3.5M | AS Saint-Étienne |
| 2023-10-16 | €3M | RC Strasbourg Alsace |
| 2023-12-18 | €2M | RC Strasbourg Alsace |
| 2024-06-03 | €2.5M | RC Strasbourg Alsace |
| 2024-10-07 | €4M | RC Strasbourg Alsace |
| 2024-12-10 | €6M | RC Strasbourg Alsace |
| 2025-06-03 | €6M | FC Nantes |
| 2025-10-10 | €4M | RC Strasbourg Alsace |
| 2025-12-15 | €3M | RC Strasbourg Alsace |
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
- −0.421
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 →Ligue 1423 players · median €5M
Valued above 30% of the 423 Ligue 1 players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 59% of the 2,065 defenders.
See them in the Explorer →Where Sow appears
- TerminalLigue 1 in the Player Explorer
- TerminalLigue 1 on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- AndréDMLOSC Lille · Ligue 1€3M
- KondogbiaDMOlympique Marseille · Ligue 1€3M
- LlorisCBLe Havre AC · Ligue 1€3M
- AjorqueCFStade Brestois 29 · Ligue 1€3M
- AlabaCBReal Madrid · defenders€3M
- VrijCBInter Milan · defenders€3M
- KeaneCBEverton FC · defenders€3M
- WeiserRBSV Werder Bremen · defenders€3M
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).