Gustavo
Sá
AMPortugal · FC Famalicão
Player dossierLiga Portugal
GustavoSá
AMAttacking MidfieldMidfield
- Club
- FC Famalicão
- League
- Liga Portugal
- Nationality
- Portugal
- Age
- 21
- Height
- 189 cm
- Foot
- Right
- Valued
- 28 May 2026
Reading the valuation
The market values Sá at €25M. Model A, which never saw Sá during training, estimates €9.2M: the market value is 171% above that estimate.
That is a factor of ×2.71. 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 €8.1M, 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
- 65
- Minutes
- 5,254
- Goals
- 8
- Assists
- 10
- Started
- 64/65
- Min / app
- 81
- 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 Sá…
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 €25M
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)
Starts
Share of appearances started rather than entered from the bench.
98% this player69% midfielder median98th 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
- €400k
- Sept 2022
- Peak
- €25M
- May 2026
- Model target
- €25M
- May 2026
- Valuations
- 13
- 0 club changes
May 2026: €25M, FC Famalicão. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-09-16 | €400k | FC Famalicão |
| 2022-11-01 | €800k | FC Famalicão |
| 2023-03-02 | €1M | FC Famalicão |
| 2023-06-16 | €1.5M | FC Famalicão |
| 2023-12-27 | €3M | FC Famalicão |
| 2024-03-08 | €6M | FC Famalicão |
| 2024-06-06 | €8M | FC Famalicão |
| 2024-12-19 | €10M | FC Famalicão |
| 2025-03-31 | €13M | FC Famalicão |
| 2025-05-30 | €16M | FC Famalicão |
| 2025-12-18 | €16M | FC Famalicão |
| 2026-03-19 | €18M | FC Famalicão |
| 2026-05-28 | €25M | FC Famalicão |
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
- +0.999
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 →Midfielders, all leagues1,687 players · median €2M
Valued above 91% of the 1,687 midfielders.
See them in the Explorer →Where Sá appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- GonçalvesLWSporting CP · Liga Portugal€25M
- TrubinGKSL Benfica · Liga Portugal€25M
- SudakovAMSL Benfica · Liga Portugal€25M
- SilvaCBSL Benfica · Liga Portugal€25M
- LocatelliDMJuventus FC · midfielders€25M
- KluivertAMAFC Bournemouth · midfielders€25M
- AdamsDMAFC Bournemouth · midfielders€25M
- BergeDMFulham FC · midfielders€25M
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).