William
Gomes
RWBrazil · FC Porto
Player dossierLiga Portugal
WilliamGomes
RWRight WingerAttack
- Club
- FC Porto
- League
- Liga Portugal
- Nationality
- Brazil
- Age
- 20
- Height
- 171 cm
- Foot
- Left
- Valued
- 28 May 2026
Liga PortugalReading the valuation
The market values Gomes at €25M. Model A, which never saw Gomes during training, estimates €32.7M: the market value is 24% below that estimate.
That is a factor of ×1.31. 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 €17.7M, 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
- 51
- Minutes
- 2,058
- Goals
- 13
- Assists
- 1
- Started
- 17/51
- Min / app
- 40
- Cards
- 9Y 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 Gomes…
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 1,583 attackers
Dashed ring: the attacker median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
35% 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
- €200k
- Mar 2024
- Peak
- €25M
- May 2026
- Model target
- €25M
- May 2026
- Valuations
- 9
- 1 club change
May 2026: €25M, FC Porto. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2024-03-28 | €200k | São Paulo Futebol Clube |
| 2024-06-17 | €500k | São Paulo Futebol Clube |
| 2024-09-27 | €5M | São Paulo Futebol Clube |
| 2024-12-09 | €6M | São Paulo Futebol Clube |
| 2025-03-31 | €9M | FC Porto |
| 2025-05-30 | €9M | FC Porto |
| 2025-09-30 | €15M | FC Porto |
| 2025-12-18 | €20M | FC Porto |
| 2026-05-28 | €25M | FC Porto |
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
- −0.269
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 90% of the 1,583 attackers.
See them in the Explorer →Where Gomes 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
- WilsonRWFulham FC · attackers€25M
- ScamaccaCFAtalanta BC · attackers€25M
- WatkinsCFAston Villa · attackers€25M
- NkunkuCFAC Milan · attackers€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).