Julian
Jeanvier
CBGuinea · Kayserispor
Player dossierSüper Lig
JulianJeanvier
CBCentre-BackDefender
- Club
- Kayserispor
- League
- Süper Lig
- Nationality
- Guinea
- Age
- 33
- Height
- 183 cm
- Foot
- Right
- Valued
- 18 Jun 2025
Süper LigReading the valuation
The market values Jeanvier at €400k. Model A, which never saw Jeanvier during training, estimates €252k: the market value is 59% above that estimate.
That is a factor of ×1.59. 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 €408k, 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
- 28
- Minutes
- 1,847
- Goals
- 1
- Assists
- 1
- Started
- 21/28
- Min / app
- 66
- Cards
- 4Y 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 Jeanvier…
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 €400k
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)
Goals per 90
Club goals per 90 minutes played in the two years to the valuation date.
0.05 this player0.03 defender median63rd 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
- Jul 2012
- Peak
- €2.5M
- May 2018
- Model target
- €400k
- Jun 2025
- Valuations
- 28
- 9 club changes
Jun 2025: €400k, Kayserispor. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-07-25 | €150k | AS Nancy-Lorraine |
| 2013-01-07 | €150k | AS Nancy-Lorraine |
| 2013-05-30 | €500k | AS Nancy-Lorraine |
| 2014-01-14 | €500k | LOSC Lille |
| 2015-01-11 | €500k | Mouscron-Péruwelz |
| 2016-02-04 | €500k | Red Star FC |
| 2016-07-13 | €500k | Stade Reims |
| 2017-03-20 | €1.3M | Stade Reims |
| 2017-06-15 | €1.8M | Stade Reims |
| 2018-05-16 | €2.5M | Stade Reims |
| 2019-06-28 | €2.5M | Brentford FC |
| 2020-02-27 | €2.5M | Brentford FC |
| 2020-04-08 | €2M | Brentford FC |
| 2020-12-23 | €1.8M | Kasimpasa |
| 2021-03-16 | €1.5M | Kasimpasa |
| 2021-05-21 | €1M | Kasimpasa |
| 2021-12-23 | €1M | Brentford FC |
| 2022-06-15 | €900k | Brentford FC |
| 2022-11-02 | €800k | AJ Auxerre |
| 2023-06-27 | €800k | AJ Auxerre |
| 2023-09-27 | €700k | Kayserispor |
| 2023-12-21 | €700k | Kayserispor |
| 2024-03-15 | €800k | Kayserispor |
| 2024-05-31 | €750k | Kayserispor |
| 2024-10-04 | €750k | Kayserispor |
| 2024-12-23 | €650k | Kayserispor |
| 2025-03-20 | €500k | Kayserispor |
| 2025-06-18 | €400k | Kayserispor |
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
- +0.464
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 15% of the 428 Süper Lig players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 14% of the 2,065 defenders.
See them in the Explorer →Where Jeanvier appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SavicCBTrabzonspor · Süper Lig€400k
- BingölCMKocaelispor · Süper Lig€400k
- BiraschiCBFatih Karagümrük · Süper Lig€400k
- SoyalpCMKayserispor · Süper Lig€400k
- YoungRBIpswich Town · defenders€400k
- LovrenCBPAOK Thessaloniki · defenders€400k
- VogtCBVfL Bochum · defenders€400k
- BrabecCBRio Ave FC · defenders€400k
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).