FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Cristian

Devenish

CBColombia · Avs Futebol

№ 726697Emerging €1.4M −0.59

Player dossierLiga Portugal

CristianDevenish

CBCentre-BackDefender

Club
Avs Futebol
League
Liga Portugal
Nationality
Colombia
Age
25
Height
192 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Devenish at €800k. Model A, which never saw Devenish during training, estimates €1.4M: the market value is 45% below that estimate.

That is a factor of ×1.80. 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 €3.3M, 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.

▼ −0.59A €1.4M▼ −1.42B €3.3M
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
58
Minutes
4,914
Goals
1
Assists
1
Started
58/58
Min / app
85
Cards
10Y 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 Devenish…

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 €800k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €800kModel A €1.4M

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 2,065 defenders

Cristian Devenish's percentiles among defenders: Goals per 90 39th, Assists per 90 37th, Minutes, two years 82nd, Starts 97th, Minutes, last 365 days 66th, European club minutes 30th39thGoals37thAssists82ndMinutes97thStarts66thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player83% defender median97th percentile

18%peer deciles · median line · this player ●100%

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
Oct 2020
Peak
€1M
May 2021
Model target
€800k
May 2026
Valuations
14
3 club changes
May 2026€800kAvs FutebolValuation the model is trained to reproduce

May 2026: €800k, Avs Futebol. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-10-22€200kBoavista FC
2021-01-28€500kBoavista FC
2021-05-21€1MBoavista FC
2022-01-13€700kAtlético Nacional
2022-06-17€650kAtlético Nacional
2022-09-05€750kAtlético Nacional
2022-12-12€850kAtlético Nacional
2023-07-07€850kAtlético Nacional
2023-12-07€750kAtlético Nacional
2024-06-06€700kRio Ave FC
2024-12-19€800kAvs Futebol
2025-05-30€800kAvs Futebol
2025-12-18€800kAvs Futebol
2026-05-28€800kAvs Futebol

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
−0.589

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 35% of the 423 Liga Portugal players.

€20k€200k€2M€20M€800kSee them in the Explorer →

Defenders, all leagues2,065 players · median €2M

Valued above 29% of the 2,065 defenders.

€20k€200k€2M€20M€800kSee them in the Explorer →

Where Devenish 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).