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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Javi

Guerra

CMSpain · Valencia CF

№ 834764Elite €15.1M +0.51

Player dossierLaLiga

JaviGuerra

CMCentral MidfieldMidfield

Club
Valencia CF
League
LaLiga
Nationality
Spain
Age
23
Height
187 cm
Foot
Right
Valued
5 Jun 2026

Reading the valuation

The market values Guerra at €25M. Model A, which never saw Guerra during training, estimates €15.1M: the market value is 66% above that estimate.

That is a factor of ×1.66. 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 €15.4M, 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.

▲ +0.51A €15.1M▲ +0.48B €15.4M
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
78
Minutes
5,028
Goals
7
Assists
9
Started
60/78
Min / app
64
Cards
8Y 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 Guerra…

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 API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €25MModel A €15.1M

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 1,687 midfielders

Javi Guerra's percentiles among midfielders: Goals per 90 64th, Assists per 90 74th, Minutes, two years 86th, Starts 65th, Minutes, last 365 days 75th, European club minutes 30th64thGoals74thAssists86thMinutes65thStarts75thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Minutes, two years

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

5,028 this player2,607 midfielder median86th percentile

451peer deciles · median line · this player ●9,624

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
€25k
Sept 2022
Peak
€25M
Jun 2025
Model target
€25M
Jun 2026
Valuations
10
1 club change
Jun 2026€25MValencia CFValuation the model is trained to reproduce

Jun 2026: €25M, Valencia CF. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2022-09-26€25kValencia Mestalla
2022-12-29€50kValencia Mestalla
2023-06-13€2MValencia Mestalla
2023-10-13€20MValencia CF
2023-12-22€20MValencia CF
2024-06-07€20MValencia CF
2024-12-27€20MValencia CF
2025-06-09€25MValencia CF
2025-12-12€25MValencia CF
2026-06-05€25MValencia 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
+0.505

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 89% of the 509 LaLiga players.

€100k€1M€10M€100M€25MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 91% of the 1,687 midfielders.

€20k€200k€2M€20M€25MSee them in the Explorer →

Where Guerra 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).