Gianluca
Prestianni
RWArgentina · SL Benfica
Image: FootyLogos
Player dossierLiga Portugal
GianlucaPrestianni
RWRight WingerAttack
- Club
- SL Benfica
- League
- Liga Portugal
- Nationality
- Argentina
- Age
- 20
- Height
- 166 cm
- Foot
- Right
- Valued
- 28 May 2026
Liga PortugalReading the valuation
The market values Prestianni at €20M. Model A, which never saw Prestianni during training, estimates €22.8M: the market value is 12% below that estimate.
That is a factor of ×1.14. 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 €14.5M, 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
- 51
- Minutes
- 2,410
- Goals
- 3
- Assists
- 7
- Started
- 26/51
- Min / app
- 47
- Cards
- 14Y 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 Prestianni…
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 €20M
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)
Assists per 90
Club assists per 90 minutes in the same window.
0.26 this player0.15 attacker median85th 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
- Jul 2022
- Peak
- €20M
- May 2026
- Model target
- €20M
- May 2026
- Valuations
- 11
- 2 club changes
May 2026: €20M, SL Benfica. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-07-01 | €50k | CA Vélez Sarsfield II |
| 2022-10-26 | €2M | CA Vélez Sarsfield II |
| 2023-04-05 | €5M | CA Vélez Sarsfield |
| 2023-07-04 | €5M | CA Vélez Sarsfield |
| 2023-12-19 | €10M | CA Vélez Sarsfield |
| 2024-06-06 | €10M | SL Benfica |
| 2024-12-19 | €10M | SL Benfica |
| 2025-03-31 | €8M | SL Benfica |
| 2025-05-30 | €8M | SL Benfica |
| 2025-12-18 | €12M | SL Benfica |
| 2026-05-28 | €20M | SL Benfica |
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
- −0.131
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 →Liga Portugal423 players · median €1M
Valued above 93% of the 423 Liga Portugal players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 87% of the 1,583 attackers.
See them in the Explorer →Where Prestianni appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SainzLWFC Porto · Liga Portugal€20M
- BarreiroCMSL Benfica · Liga Portugal€18M
- HornicekGKSC Braga · Liga Portugal€18M
- CostaRBFC Porto · Liga Portugal€18M
- SanéRWGalatasaray · attackers€20M
- GrealishLWEverton FC · attackers€20M
- IwobiLWFulham FC · attackers€20M
- AktürkoğluLWFenerbahce · attackers€20M
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).