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.
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  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

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Portrait of Ryan Sessegnon

Ryan

Sessegnon

LBEngland · Fulham FC

№ 392775Elite €21.9M 0.00

Image: FootyLogos

Player dossierPremier League

RyanSessegnon

LBLeft-BackDefender

Club
Fulham FC
League
Premier League
Nationality
England
Age
26
Height
178 cm
Foot
Left
Valued
3 Jun 2026

Reading the valuation

The market values Sessegnon at €22M. Model A, which never saw Sessegnon during training, estimates €21.9M: the market value is level with that estimate.

That is a factor of ×1.00. 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 €1.1M, 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.

▲ 0.00A €21.9M▲ +3.03B €1.1M
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
52
Minutes
2,969
Goals
7
Assists
6
Started
33/52
Min / app
57
Cards
1Y 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 Sessegnon…

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 €22M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €22MModel A €21.9M

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

Ryan Sessegnon's percentiles among defenders: Goals per 90 99th, Assists per 90 93rd, Minutes, two years 52nd, Starts 19th, Minutes, last 365 days 65th, European club minutes 30th99thGoals93rdAssists52ndMinutes19thStarts65thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.21 this player0.03 defender median99th percentile

0.00peer deciles · median line · this player ●0.41

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
€500k
Sept 2016
Peak
€35M
Aug 2018
Model target
€22M
Jun 2026
Valuations
25
4 club changes
Jun 2026€22MFulham FCValuation the model is trained to reproduce

Jun 2026: €22M, Fulham FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2016-09-01€500kFulham FC
2017-02-27€3MFulham FC
2017-09-18€8MFulham FC
2018-02-27€25MFulham FC
2018-08-13€35MFulham FC
2018-12-19€35MFulham FC
2019-06-13€35MFulham FC
2019-12-10€35MTottenham Hotspur
2020-04-08€31.5MTottenham Hotspur
2020-07-30€25MTottenham Hotspur
2020-11-26€20MTSG 1899 Hoffenheim
2021-02-10€20MTSG 1899 Hoffenheim
2021-06-09€18MTSG 1899 Hoffenheim
2021-12-23€15MTottenham Hotspur
2022-06-15€18MTottenham Hotspur
2022-09-15€22MTottenham Hotspur
2022-11-03€22MTottenham Hotspur
2023-06-20€18MTottenham Hotspur
2023-12-19€13MTottenham Hotspur
2024-05-27€10MTottenham Hotspur
2024-12-16€9MFulham FC
2025-05-30€15MFulham FC
2025-10-17€18MFulham FC
2025-12-09€20MFulham FC
2026-06-03€22MFulham FC

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
+0.003

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 59% of the 555 Premier League players.

€150k€1M€7.5M€50M€22MSee them in the Explorer →

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

Valued above 92% of the 2,065 defenders.

€20k€200k€2M€20M€22MSee them in the Explorer →

Where Sessegnon 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).