Sinaly
Diomandé
CBCote d'Ivoire · AJ Auxerre
Player dossierLigue 1
SinalyDiomandé
CBCentre-BackDefender
- Club
- AJ Auxerre
- League
- Ligue 1
- Nationality
- Cote d'Ivoire
- Age
- 25
- Height
- 184 cm
- Foot
- Right
- Valued
- 1 Jun 2026
Ligue 1Reading the valuation
The market values Diomandé at €6M. Model A, which never saw Diomandé during training, estimates €6.9M: the market value is 12% below that estimate.
That is a factor of ×1.14. 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 €5.6M, closer to the market here, although it is usually further off (typical miss ×2.07).
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 47
- Minutes
- 4,079
- Goals
- 5
- Assists
- 4
- Started
- 46/47
- Min / app
- 87
- Cards
- 8Y 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 Diomandé…
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 €6M
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.
98% this player83% defender median92nd 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
- €1.5M
- Oct 2020
- Peak
- €9M
- Jun 2023
- Model target
- €6M
- Jun 2026
- Valuations
- 17
- 1 club change
Jun 2026: €6M, AJ Auxerre. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-10-15 | €1.5M | Olympique Lyon |
| 2021-01-07 | €4M | Olympique Lyon |
| 2021-04-09 | €7M | Olympique Lyon |
| 2021-06-04 | €7M | Olympique Lyon |
| 2021-12-16 | €7M | Olympique Lyon |
| 2022-05-30 | €5M | Olympique Lyon |
| 2022-11-02 | €5M | Olympique Lyon |
| 2023-03-27 | €7M | Olympique Lyon |
| 2023-06-27 | €9M | Olympique Lyon |
| 2023-12-18 | €7M | Olympique Lyon |
| 2024-03-19 | €5M | Olympique Lyon |
| 2024-06-03 | €4M | Olympique Lyon |
| 2024-12-10 | €5M | AJ Auxerre |
| 2025-06-03 | €5M | AJ Auxerre |
| 2025-12-15 | €4M | AJ Auxerre |
| 2026-03-27 | €5M | AJ Auxerre |
| 2026-06-01 | €6M | AJ Auxerre |
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
- −0.133
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 50% of the 423 Ligue 1 players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 73% of the 2,065 defenders.
See them in the Explorer →Where Diomandé 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
- RulliGKOlympique Marseille · Ligue 1€6M
- FrankowskiRBStade Rennais FC · Ligue 1€6M
- MakengoAMFC Lorient · Ligue 1€6M
- NamasoLWAJ Auxerre · Ligue 1€6M
- RüdigerCBReal Madrid · defenders€6M
- DigneLBAston Villa · defenders€6M
- RomagnoliCBSS Lazio · defenders€6M
- PoschCB1.FSV Mainz 05 · defenders€6M
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).