Isak
Jansson
LWSweden · OGC Nice
Player dossierLigue 1
IsakJansson
LWLeft WingerAttack
- Club
- OGC Nice
- League
- Ligue 1
- Nationality
- Sweden
- Age
- 24
- Height
- 175 cm
- Foot
- Right
- Valued
- 1 Jun 2026
Ligue 1Reading the valuation
The market values Jansson at €4M. Model A, which never saw Jansson during training, estimates €2.2M: the market value is 80% above that estimate.
That is a factor of ×1.80. 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 €2.2M, 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
- 28
- Minutes
- 967
- Goals
- 1
- Assists
- 0
- Started
- 11/28
- Min / app
- 35
- 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 Jansson…
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 €4M
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.
34% this player0% attacker median97th 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
- €100k
- Nov 2019
- Peak
- €6M
- Oct 2025
- Model target
- €4M
- Jun 2026
- Valuations
- 16
- 3 club changes
Jun 2026: €4M, OGC Nice. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-11-20 | €100k | Kalmar FF |
| 2020-08-05 | €350k | Kalmar FF |
| 2020-12-10 | €350k | Kalmar FF |
| 2021-06-09 | €400k | Kalmar FF |
| 2021-12-17 | €700k | Kalmar FF |
| 2022-06-24 | €1M | Kalmar FF |
| 2022-12-29 | €1M | FC Cartagena |
| 2023-06-14 | €1M | FC Cartagena |
| 2023-12-20 | €1M | FC Cartagena |
| 2024-05-21 | €1M | Rapid Vienna |
| 2024-10-10 | €2.5M | Rapid Vienna |
| 2024-12-17 | €3M | Rapid Vienna |
| 2025-06-06 | €3.5M | Rapid Vienna |
| 2025-10-10 | €6M | OGC Nice |
| 2025-12-15 | €5M | OGC Nice |
| 2026-06-01 | €4M | OGC Nice |
Audit context group-level, not about this player
- Audit group
- UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- +0.588
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 37% of the 423 Ligue 1 players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 59% of the 1,583 attackers.
See them in the Explorer →Where Jansson 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
- TagliaficoLBOlympique Lyon · Ligue 1€4M
- ClaussRBOGC Nice · Ligue 1€4M
- DierCBAS Monaco · Ligue 1€4M
- ThomassonCMRC Lens · Ligue 1€4M
- IcardiCFGalatasaray · attackers€4M
- WilsonCFWest Ham United · attackers€4M
- TraoréRWSunderland AFC · attackers€4M
- GrifoLWSC Freiburg · attackers€4M
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).