Frédéric
Guilbert
RBFrance · FC Nantes
Player dossierLigue 1
FrédéricGuilbert
RBRight-BackDefender
- Club
- FC Nantes
- League
- Ligue 1
- Nationality
- France
- Age
- 31
- Height
- 178 cm
- Foot
- Right
- Valued
- 1 Jun 2026
Reading the valuation
The market values Guilbert at €800k. Model A, which never saw Guilbert during training, estimates €962k: the market value is 17% below that estimate.
That is a factor of ×1.20. 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 €980k, 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.
- Apps
- 40
- Minutes
- 3,150
- Goals
- 0
- Assists
- 1
- Started
- 39/40
- Min / app
- 79
- Cards
- 4Y 2R
Club matches, two years to the valuation date
The Valuation Journey
What moves Model A
Asking the prediction API to explain Model A for Guilbert…
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 APIAsking 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
Dashed ring: the defender median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
98% this player83% defender median91st percentile
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
- €150k
- Jul 2015
- Peak
- €9M
- Dec 2019
- Model target
- €800k
- Jun 2026
- Valuations
- 28
- 7 club changes
Jun 2026: €800k, FC Nantes. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2015-07-02 | €150k | FC Girondins Bordeaux |
| 2015-09-06 | €600k | FC Girondins Bordeaux |
| 2016-02-04 | €1.5M | FC Girondins Bordeaux |
| 2016-07-13 | €2M | FC Girondins Bordeaux |
| 2017-01-16 | €2M | SM Caen |
| 2017-06-01 | €2.5M | SM Caen |
| 2018-01-24 | €4M | SM Caen |
| 2018-03-20 | €5M | SM Caen |
| 2018-06-04 | €6M | SM Caen |
| 2018-12-17 | €7M | SM Caen |
| 2019-06-03 | €6M | SM Caen |
| 2019-12-10 | €9M | Aston Villa |
| 2020-04-08 | €7M | Aston Villa |
| 2020-10-13 | €7M | Aston Villa |
| 2020-12-17 | €5M | Aston Villa |
| 2021-06-04 | €6M | RC Strasbourg Alsace |
| 2021-12-16 | €6M | RC Strasbourg Alsace |
| 2022-05-30 | €7M | RC Strasbourg Alsace |
| 2022-11-03 | €5M | Aston Villa |
| 2023-06-27 | €4.5M | RC Strasbourg Alsace |
| 2023-12-18 | €4M | RC Strasbourg Alsace |
| 2024-06-03 | €4M | RC Strasbourg Alsace |
| 2024-10-18 | €3M | US Lecce |
| 2024-12-18 | €2.5M | US Lecce |
| 2025-06-17 | €2.5M | US Lecce |
| 2025-10-07 | €1M | US Lecce |
| 2025-12-23 | €800k | US Lecce |
| 2026-06-01 | €800k | FC Nantes |
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
- −0.185
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 7% of the 423 Ligue 1 players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 29% of the 2,065 defenders.
See them in the Explorer →Where Guilbert appears
- TerminalLigue 1 in the Player Explorer
- TerminalLigue 1 on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- LéonGKAJ Auxerre · Ligue 1€800k
- BusiRBStade Reims · Ligue 1€800k
- GamborCBESTAC Troyes · Ligue 1€800k
- PatrickCMStade Reims · Ligue 1€800k
- CaraccioloCBPisa Sporting Club · defenders€800k
- BianchettiCBUS Cremonese · defenders€800k
- WidmerRB1.FSV Mainz 05 · defenders€800k
- WinckRBKasimpasa · defenders€800k
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).