Santiago
Hezze
DMArgentina · Olympiacos Piraeus
Player dossierSuper League
SantiagoHezze
DMDefensive MidfieldMidfield
- Club
- Olympiacos Piraeus
- League
- Super League
- Nationality
- Argentina
- Age
- 24
- Height
- 178 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Super LeagueReading the valuation
The market values Hezze at €14M. Model A, which never saw Hezze during training, estimates €9.8M: the market value is 42% above that estimate.
That is a factor of ×1.42. 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 €11.5M, 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
- 71
- Minutes
- 4,935
- Goals
- 2
- Assists
- 1
- Started
- 54/71
- Min / app
- 70
- Cards
- 13Y 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 Hezze…
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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
28% this player0% midfielder median95th 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
- Mar 2020
- Peak
- €14M
- Dec 2025
- Model target
- €14M
- Jun 2026
- Valuations
- 15
- 1 club change
Jun 2026: €14M, Olympiacos Piraeus. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-03-20 | €100k | CA Huracán |
| 2021-02-08 | €750k | CA Huracán |
| 2021-10-20 | €750k | CA Huracán |
| 2022-05-24 | €900k | CA Huracán |
| 2022-09-06 | €4M | CA Huracán |
| 2022-10-26 | €5.5M | CA Huracán |
| 2023-04-05 | €8M | CA Huracán |
| 2023-07-04 | €8M | CA Huracán |
| 2023-12-20 | €8M | Olympiacos Piraeus |
| 2024-05-30 | €10M | Olympiacos Piraeus |
| 2024-09-26 | €12M | Olympiacos Piraeus |
| 2024-12-18 | €12M | Olympiacos Piraeus |
| 2025-05-23 | €12M | Olympiacos Piraeus |
| 2025-12-12 | €14M | Olympiacos Piraeus |
| 2026-06-04 | €14M | Olympiacos Piraeus |
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
- +0.352
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 →Super League356 players · median €600k
4th highest observed value among 356 Super League players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 83% of the 1,687 midfielders.
See them in the Explorer →Where Hezze appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- PirolaCBOlympiacos Piraeus · Super League€11M
- ZafeirisCMPAOK Thessaloniki · Super League€11M
- TzolakisGKOlympiacos Piraeus · Super League€18M
- JovićCFAEK Athens · Super League€9M
- StageCMSV Werder Bremen · midfielders€14M
- WillockCMNewcastle United · midfielders€14M
- KoopmeinersDMJuventus FC · midfielders€14M
- FergusonCMBologna FC 1909 · midfielders€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).