Ernest
Nuamah
RWGhana · Olympique Lyon
Player dossierLigue 1
ErnestNuamah
RWRight WingerAttack
- Club
- Olympique Lyon
- League
- Ligue 1
- Nationality
- Ghana
- Age
- 22
- Height
- 178 cm
- Foot
- Left
- Valued
- 1 Jun 2026
Ligue 1Reading the valuation
The market values Nuamah at €10M. Model A, which never saw Nuamah during training, estimates €5.4M: the market value is 87% above that estimate.
That is a factor of ×1.87. 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 €5.1M, 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
- 35
- Minutes
- 1,624
- Goals
- 6
- Assists
- 2
- Started
- 20/35
- Min / app
- 46
- Cards
- 3Y 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 Nuamah…
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 €10M
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 1,583 attackers
Dashed ring: the attacker median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
33% this player0% attacker median96th 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
- Jun 2022
- Peak
- €20M
- Oct 2023
- Model target
- €10M
- Jun 2026
- Valuations
- 11
- 1 club change
Jun 2026: €10M, Olympique Lyon. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-06-20 | €150k | FC Nordsjaelland |
| 2022-09-13 | €700k | FC Nordsjaelland |
| 2022-12-22 | €1.5M | FC Nordsjaelland |
| 2023-06-26 | €6M | FC Nordsjaelland |
| 2023-10-16 | €20M | Olympique Lyon |
| 2023-12-18 | €18M | Olympique Lyon |
| 2024-06-03 | €18M | Olympique Lyon |
| 2024-12-10 | €15M | Olympique Lyon |
| 2025-06-03 | €15M | Olympique Lyon |
| 2025-12-15 | €12M | Olympique Lyon |
| 2026-06-01 | €10M | Olympique Lyon |
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
- +0.624
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 66% of the 423 Ligue 1 players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 77% of the 1,583 attackers.
See them in the Explorer →Where Nuamah 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
- MinaminoLWAS Monaco · Ligue 1€10M
- TolissoCMOlympique Lyon · Ligue 1€10M
- Saint-MaximinLWRC Lens · Ligue 1€10M
- Maitland-NilesRBOlympique Lyon · Ligue 1€10M
- CórdobaCFFC Krasnodar · attackers€10M
- NmechaCFLeeds United · attackers€10M
- JamesRWLeeds United · attackers€10M
- KühnRWComo 1907 · attackers€10M
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).