Rúben
Fernandes
CBPortugal · SC Farense
Player dossierLiga Portugal
RúbenFernandes
CBCentre-BackDefender
- Club
- SC Farense
- League
- Liga Portugal
- Nationality
- Portugal
- Age
- 39
- Height
- 187 cm
- Foot
- Right
- Valued
- 22 Dec 2025
Reading the valuation
The market values Fernandes at €25k. Model A, which never saw Fernandes during training, estimates €70k: the market value is 65% below that estimate.
That is a factor of ×2.82. 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 €98k, 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
- 43
- Minutes
- 3,855
- Goals
- 1
- Assists
- 1
- Started
- 43/43
- Min / app
- 90
- Cards
- 5Y 1R
Club matches, two years to the valuation date
The Valuation Journey
What moves Model A
Asking the prediction API to explain Model A for Fernandes…
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 €25k
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.
100% this player83% defender 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
- €50k
- Nov 2008
- Peak
- €2M
- Feb 2015
- Model target
- €25k
- Dec 2025
- Valuations
- 31
- 6 club changes
Dec 2025: €25k, SC Farense. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2008-11-22 | €50k | Varzim SC |
| 2009-10-06 | €15k | Portimonense SAD |
| 2009-10-13 | €150k | Portimonense SAD |
| 2010-08-04 | €200k | Portimonense SAD |
| 2011-10-01 | €400k | Portimonense SAD |
| 2014-02-26 | €1M | GD Estoril Praia |
| 2014-07-25 | €1.5M | GD Estoril Praia |
| 2015-02-17 | €2M | GD Estoril Praia |
| 2015-07-01 | €2M | Sint-Truidense VV |
| 2016-02-07 | €1.5M | Sint-Truidense VV |
| 2016-04-14 | €1.2M | Sint-Truidense VV |
| 2016-07-15 | €750k | Sint-Truidense VV |
| 2017-01-21 | €700k | Sint-Truidense VV |
| 2017-06-06 | €700k | Sint-Truidense VV |
| 2018-02-07 | €700k | Portimonense SAD |
| 2018-06-13 | €700k | Portimonense SAD |
| 2019-01-11 | €400k | Portimonense SAD |
| 2019-06-07 | €300k | Portimonense SAD |
| 2019-12-30 | €300k | Gil Vicente FC |
| 2020-08-17 | €300k | Gil Vicente FC |
| 2021-01-28 | €200k | Gil Vicente FC |
| 2021-05-21 | €100k | Gil Vicente FC |
| 2021-12-27 | €100k | Gil Vicente FC |
| 2022-05-31 | €100k | Gil Vicente FC |
| 2022-11-01 | €100k | Gil Vicente FC |
| 2023-06-16 | €100k | Gil Vicente FC |
| 2023-12-27 | €100k | Gil Vicente FC |
| 2024-06-06 | €100k | Gil Vicente FC |
| 2024-12-19 | €100k | Gil Vicente FC |
| 2025-05-30 | €50k | Gil Vicente FC |
| 2025-12-22 | €25k | SC Farense |
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
- −1.036
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
The lowest observed value among 423 Liga Portugal players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
The joint lowest observed value among 2,065 defenders.
See them in the Explorer →Where Fernandes appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- NenêCFAvs Futebol · Liga Portugal€50k
- MatiasLWSC Farense · Liga Portugal€50k
- AurélioRBCD Nacional · Liga Portugal€50k
- BebetoRBCD Tondela · Liga Portugal€50k
- PapageorgiouRBAE Larisa · defenders€25k
- NielsenCBVejle Boldklub · defenders€25k
- McGowanCBLivingston FC · defenders€25k
- PaulsenCBOdense Boldklub · defenders€25k
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).