Jay
Idzes
CBIndonesia · US Sassuolo
Close-up
Image: FootyLogos
Player dossierSerie A
JayIdzes
CBCentre-BackDefender
- Club
- US Sassuolo
- League
- Serie A
- Nationality
- Indonesia
- Age
- 25
- Height
- 190 cm
- Foot
- Right
- Valued
- 29 May 2026
Serie AReading the valuation
The market values Idzes at €14M. Model A, which never saw Idzes during training, estimates €9.7M: the market value is 45% above that estimate.
That is a factor of ×1.45. 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 €8.7M, 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
- 71
- Minutes
- 6,282
- Goals
- 2
- Assists
- 0
- Started
- 71/71
- Min / app
- 88
- 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 Idzes…
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 €14M
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.
100% this player83% defender 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
- €250k
- Jan 2019
- Peak
- €14M
- May 2026
- Model target
- €14M
- May 2026
- Valuations
- 18
- 3 club changes
May 2026: €14M, US Sassuolo. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-01-21 | €250k | FC Eindhoven |
| 2019-07-03 | €250k | FC Eindhoven |
| 2020-06-29 | €350k | FC Eindhoven |
| 2020-10-24 | €375k | Go Ahead Eagles |
| 2020-12-31 | €375k | Go Ahead Eagles |
| 2022-01-05 | €375k | Go Ahead Eagles |
| 2022-06-08 | €500k | Go Ahead Eagles |
| 2022-09-14 | €600k | Go Ahead Eagles |
| 2022-11-11 | €600k | Go Ahead Eagles |
| 2023-06-23 | €750k | Go Ahead Eagles |
| 2023-12-27 | €900k | Venezia FC |
| 2024-03-25 | €1.4M | Venezia FC |
| 2024-06-03 | €2.5M | Venezia FC |
| 2024-12-18 | €3M | Venezia FC |
| 2025-03-25 | €5M | Venezia FC |
| 2025-06-17 | €7.5M | Venezia FC |
| 2025-12-23 | €10M | US Sassuolo |
| 2026-05-29 | €14M | US Sassuolo |
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
- +0.370
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 73% of the 507 Serie A players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 86% of the 2,065 defenders.
See them in the Explorer →Where Idzes 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
- ÇelikRBAS Roma · Serie A€14M
- KoopmeinersDMJuventus FC · Serie A€14M
- FergusonCMBologna FC 1909 · Serie A€14M
- PiccoliCFACF Fiorentina · Serie A€14M
- SallaiRBGalatasaray · defenders€14M
- GattiCBJuventus FC · defenders€14M
- FlamingoCBPSV Eindhoven · defenders€14M
- MoratoCBNottingham Forest · defenders€14M
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).