Jean
Onana
DMCameroon · Genoa CFC
Player dossierSerie A
JeanOnana
DMDefensive MidfieldMidfield
- Club
- Genoa CFC
- League
- Serie A
- Nationality
- Cameroon
- Age
- 26
- Height
- 189 cm
- Foot
- Right
- Valued
- 29 May 2026
Serie AReading the valuation
The market values Onana at €1M. Model A, which never saw Onana during training, estimates €1.2M: the market value is 18% below that estimate.
That is a factor of ×1.22. 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 €1M, 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
- 18
- Minutes
- 500
- Goals
- 0
- Assists
- 0
- Started
- 3/18
- Min / app
- 28
- 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 Onana…
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 €1M
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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
19% this player0% midfielder median83rd 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
- Jun 2019
- Peak
- €6M
- Jun 2023
- Model target
- €1M
- May 2026
- Valuations
- 20
- 7 club changes
May 2026: €1M, Genoa CFC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-06-29 | €50k | Leixões SC U19 |
| 2020-08-06 | €500k | Royal Excel Mouscron (-2022) |
| 2020-10-16 | €500k | Royal Excel Mouscron (-2022) |
| 2021-01-04 | €900k | Royal Excel Mouscron (-2022) |
| 2021-06-07 | €900k | Royal Excel Mouscron (-2022) |
| 2021-10-08 | €2.5M | FC Girondins Bordeaux |
| 2021-12-16 | €4M | FC Girondins Bordeaux |
| 2022-05-30 | €5M | FC Girondins Bordeaux |
| 2022-11-02 | €5M | RC Lens |
| 2023-03-27 | €4M | RC Lens |
| 2023-06-27 | €6M | RC Lens |
| 2023-09-27 | €4.8M | Besiktas JK |
| 2023-12-21 | €3.7M | Besiktas JK |
| 2024-03-19 | €4M | Olympique Marseille |
| 2024-06-03 | €4M | Olympique Marseille |
| 2024-10-04 | €3.7M | Besiktas JK |
| 2024-12-23 | €3M | Besiktas JK |
| 2025-06-17 | €1.8M | Genoa CFC |
| 2025-12-23 | €1.3M | Genoa CFC |
| 2026-05-29 | €1M | Genoa CFC |
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
- −0.195
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 →Serie A507 players · median €5.5M
Valued above 8% of the 507 Serie A players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 32% of the 1,687 midfielders.
See them in the Explorer →Where Onana appears
- TerminalSerie A in the Player Explorer
- TerminalSerie A 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
- PedroRWSS Lazio · Serie A€1M
- DjuricCFUS Cremonese · Serie A€1M
- LealiGKGenoa CFC · Serie A€1M
- VardyCFUS Cremonese · Serie A€1M
- ParejoCMVillarreal CF · midfielders€1M
- DemirbayCMKasimpasa · midfielders€1M
- Oxlade-ChamberlainCMCeltic FC · midfielders€1M
- VecinoCMCelta de Vigo · midfielders€1M
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).