FairValue

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Bouna

Sarr

RBSenegal · FC Metz

№ 190685Emerging €337k +0.04

Player dossierLigue 1

BounaSarr

RBRight-BackDefender

Club
FC Metz
League
Ligue 1
Nationality
Senegal
Age
34
Height
178 cm
Foot
Right
Valued
1 Jun 2026

Reading the valuation

The market values Sarr at €350k. Model A, which never saw Sarr during training, estimates €337k: the market value is 4% above that estimate.

That is a factor of ×1.04. 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 €449k, 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.

▲ +0.04A €337k▼ −0.25B €449k
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
12
Minutes
897
Goals
0
Assists
0
Started
10/12
Min / app
75
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 Sarr…

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 €350k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €350kModel A €337k

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

Bouna Sarr's percentiles among defenders: Goals per 90 18th, Assists per 90 17th, Minutes, two years 10th, Starts 52nd, Minutes, last 365 days 26th, European club minutes 30th18thGoals17thAssists10thMinutes52ndStarts26thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

83% this player83% defender median52nd 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
€50k
Jul 2011
Peak
€9M
Aug 2020
Model target
€350k
Jun 2026
Valuations
34
4 club changes
Jun 2026€350kFC MetzValuation the model is trained to reproduce

Jun 2026: €350k, FC Metz. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2011-07-22€50kFC Metz
2011-09-03€300kFC Metz
2011-12-25€300kFC Metz
2012-06-01€300kFC Metz
2014-01-13€750kFC Metz
2014-08-07€1MFC Metz
2015-01-14€1MFC Metz
2015-06-06€1.5MFC Metz
2015-09-06€2MOlympique Marseille
2016-02-04€2MOlympique Marseille
2016-07-13€1.8MOlympique Marseille
2017-01-16€2MOlympique Marseille
2017-06-01€2MOlympique Marseille
2018-01-24€3.5MOlympique Marseille
2018-06-04€6MOlympique Marseille
2018-10-24€8MOlympique Marseille
2018-12-17€8MOlympique Marseille
2019-06-03€6MOlympique Marseille
2019-12-19€8MOlympique Marseille
2020-04-08€6.5MOlympique Marseille
2020-08-03€9MOlympique Marseille
2021-02-10€5.5MBayern Munich
2021-06-09€4MBayern Munich
2021-10-07€3MBayern Munich
2021-12-22€3MBayern Munich
2022-06-09€2.5MBayern Munich
2022-11-09€2.5MBayern Munich
2023-06-22€2MBayern Munich
2023-12-14€2MBayern Munich
2024-05-29€1.5MBayern Munich
2024-10-16€1MWithout Club
2025-04-04€700kWithout Club
2025-10-21€400kWithout Club
2026-06-01€350kFC Metz

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
+0.037

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 →

Ligue 1423 players · median €5M

Valued above 2% of the 423 Ligue 1 players.

€100k€750k€5M€30M€350kSee them in the Explorer →

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

Valued above 12% of the 2,065 defenders.

€20k€200k€2M€20M€350kSee them in the Explorer →

Where Sarr 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).