Chissumba
LBPortugal · FC Alverca
Player dossierLiga Portugal
Chissumba
LBLeft-BackDefender
- Club
- FC Alverca
- League
- Liga Portugal
- Nationality
- Portugal
- Age
- 21
- Height
- 180 cm
- Foot
- Left
- Valued
- 28 May 2026
Reading the valuation
The market values Chissumba at €5M. Model A, which never saw Chissumba during training, estimates €2.6M: the market value is 94% above that estimate.
That is a factor of ×1.94. 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 €7.5M, 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
- 37
- Minutes
- 3,088
- Goals
- 0
- Assists
- 1
- Started
- 35/37
- Min / app
- 83
- Cards
- 6Y 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 Chissumba…
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 €5M
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.
95% this player83% defender median83rd 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
- €3M
- Mar 2025
- Peak
- €5M
- May 2025
- Model target
- €5M
- May 2026
- Valuations
- 4
- 1 club change
May 2026: €5M, FC Alverca. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2025-03-31 | €3M | SC Braga |
| 2025-05-30 | €5M | SC Braga |
| 2025-12-18 | €5M | FC Alverca |
| 2026-05-28 | €5M | FC Alverca |
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
- +0.662
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 76% of the 423 Liga Portugal players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 70% of the 2,065 defenders.
See them in the Explorer →Where Chissumba appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- CarvalhoAMGD Estoril Praia · Liga Portugal€5M
- CarevićGKFC Famalicão · Liga Portugal€5M
- GuitaneRWGD Estoril Praia · Liga Portugal€5M
- RamírezCFCD Nacional · Liga Portugal€5M
- OrbánCBRB Leipzig · defenders€5M
- GinterCBSC Freiburg · defenders€5M
- GuerreiroLBBayern Munich · defenders€5M
- TarkowskiCBEverton FC · defenders€5M
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).