FairValue

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

Sylla

DMFrance · Livingston FC

№ 526790Emerging €173k −0.84

Player dossierPremiership

MohamadSylla

DMDefensive MidfieldMidfield

Club
Livingston FC
League
Premiership
Nationality
France
Age
32
Height
188 cm
Foot
Right
Valued
20 May 2026

Reading the valuation

The market values Sylla at €75k. Model A, which never saw Sylla during training, estimates €173k: the market value is 57% below that estimate.

That is a factor of ×2.31. 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 €1.1M, 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.

▼ −0.84A €173k▼ −2.70B €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
64
Minutes
4,644
Goals
1
Assists
0
Started
53/64
Min / app
73
Cards
15Y 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 Sylla…

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 €75k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €75kModel A €173k

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

Mohamad Sylla's percentiles among midfielders: Goals per 90 21st, Assists per 90 8th, Minutes, two years 83rd, Starts 75th, Minutes, last 365 days 63rd, European club minutes 30th21stGoals8thAssists83rdMinutes75thStarts63rdRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Minutes, two years

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

4,644 this player2,607 midfielder median83rd 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
€200k
Nov 2020
Peak
€200k
Nov 2020
Model target
€75k
May 2026
Valuations
11
3 club changes
May 2026€75kLivingston FCValuation the model is trained to reproduce

May 2026: €75k, Livingston FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-11-11€200kStade Lavallois
2021-06-25€200kStade Lavallois
2023-04-06€200kHartlepool United
2023-06-23€150kHartlepool United
2023-12-05€125kDundee FC
2024-05-30€125kDundee FC
2024-12-03€125kDundee FC
2025-06-17€125kDundee FC
2025-12-10€100kLivingston FC
2026-03-05€75kLivingston FC
2026-05-20€75kLivingston 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
−0.835

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 →

Premiership311 players · median €400k

Valued above 5% of the 311 Premiership players.

€20k€150k€1M€7.5M€75kSee them in the Explorer →

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

Valued above 0% of the 1,687 midfielders.

€20k€200k€2M€20M€75kSee them in the Explorer →

Where Sylla 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).