FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

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Luis

Rioja

RWSpain · Valencia CF

№ 278837Emerging €2.3M −0.25

Player dossierLaLiga

LuisRioja

RWRight WingerAttack

Club
Valencia CF
League
LaLiga
Nationality
Spain
Age
32
Height
176 cm
Foot
Left
Valued
5 Jun 2026

Reading the valuation

The market values Rioja at €1.8M. Model A, which never saw Rioja during training, estimates €2.3M: the market value is 22% below that estimate.

That is a factor of ×1.28. 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 €3.4M, 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.

▼ −0.25A €2.3M▼ −0.64B €3.4M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
81
Minutes
5,765
Goals
9
Assists
9
Started
65/81
Min / app
71
Cards
7Y 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 Rioja…

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 €1.8M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1.8MModel A €2.3M

Asking 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

Luis Rioja's percentiles among attackers: Goals per 90 21st, Assists per 90 48th, Minutes, two years 96th, Starts 83rd, Minutes, last 365 days 93rd, European club minutes 28th21stGoals48thAssists96thMinutes83rdStarts93rdRecent28thEurope

Dashed ring: the attacker median (50th percentile)

Minutes, two years

Total club minutes in the two-year window: how much the player was used.

5,765 this player2,242 attacker median96th percentile

450peer deciles · median line · this player ●8,788

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
€300k
Aug 2016
Peak
€4M
Mar 2024
Model target
€1.8M
Jun 2026
Valuations
24
4 club changes
Jun 2026€1.8MValencia CFValuation the model is trained to reproduce

Jun 2026: €1.8M, Valencia CF. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2016-08-01€300kCelta Vigo B
2017-02-02€200kMarbella FC
2017-06-30€150kMarbella FC
2018-01-01€300kMarbella FC
2018-06-30€300kMarbella FC
2019-02-19€1MUD Almería
2019-06-29€1.5MUD Almería
2019-12-20€2MDeportivo Alavés
2020-03-05€2.5MDeportivo Alavés
2020-04-08€2MDeportivo Alavés
2020-10-08€1.5MDeportivo Alavés
2021-01-05€2MDeportivo Alavés
2021-06-10€3MDeportivo Alavés
2021-12-30€3MDeportivo Alavés
2022-06-03€3MDeportivo Alavés
2022-12-29€3MDeportivo Alavés
2023-06-14€3MDeportivo Alavés
2023-12-22€3MDeportivo Alavés
2024-03-21€4MDeportivo Alavés
2024-06-07€4MDeportivo Alavés
2024-12-27€2MValencia CF
2025-06-09€2MValencia CF
2025-12-12€2MValencia CF
2026-06-05€1.8MValencia CF

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
−0.251

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 →

LaLiga509 players · median €4M

Valued above 25% of the 509 LaLiga players.

€100k€1M€10M€100M€1.8MSee them in the Explorer →

Attackers, all leagues1,583 players · median €2.5M

Valued above 43% of the 1,583 attackers.

€20k€300k€5M€75M€1.8MSee them in the Explorer →

Where Rioja appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

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).