FairValue

Checking model

Esc

  • 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.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Djibril

Soumaré

DMSenegal · Sheffield United

№ 1041532Emerging €3.3M −0.78

Player dossierPremier League

DjibrilSoumaré

DMDefensive MidfieldMidfield

Club
Sheffield United
League
Premier League
Nationality
Senegal
Age
22
Height
189 cm
Foot
Left
Valued
3 Dec 2025

Reading the valuation

The market values Soumaré at €1.5M. Model A, which never saw Soumaré during training, estimates €3.3M: the market value is 54% below that estimate.

That is a factor of ×2.18. 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 €1.9M, 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.

▼ −0.78A €3.3M▼ −0.26B €1.9M
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
24
Minutes
1,885
Goals
1
Assists
1
Started
21/24
Min / app
79
Cards
9Y 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 Soumaré…

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 €1.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €1.5MModel A €3.3M

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 1,687 midfielders

Djibril Soumaré's percentiles among midfielders: Goals per 90 33rd, Assists per 90 27th, Minutes, two years 33rd, Starts 83rd, Minutes, last 365 days 56th, European club minutes 30th33rdGoals27thAssists33rdMinutes83rdStarts56thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

88% this player69% midfielder median83rd percentile

7%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
Sept 2023
Peak
€1.5M
May 2025
Model target
€1.5M
Dec 2025
Valuations
6
2 club changes
Dec 2025€1.5MSheffield UnitedValuation the model is trained to reproduce

Dec 2025: €1.5M, Sheffield United. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2023-09-23€200kSC Braga B
2024-07-16€200kCD Nacional
2024-12-19€400kCD Nacional
2025-03-31€1MCD Nacional
2025-05-30€1.5MCD Nacional
2025-12-03€1.5MSheffield United

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
−0.779

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 →

Premier League555 players · median €18M

Valued above 7% of the 555 Premier League players.

€150k€1M€7.5M€50M€1.5MSee them in the Explorer →

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

Valued above 39% of the 1,687 midfielders.

€20k€200k€2M€20M€1.5MSee them in the Explorer →

Where Soumaré 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).