Roméo
Lavia
DMBelgium · Chelsea FC
Image: FootyLogos
Player dossierPremier League
RoméoLavia
DMDefensive MidfieldMidfield
- Club
- Chelsea FC
- League
- Premier League
- Nationality
- Belgium
- Age
- 22
- Height
- 181 cm
- Foot
- Right
- Valued
- 3 Jun 2026
Premier LeagueReading the valuation
The market values Lavia at €22M. Model A, which never saw Lavia during training, estimates €16.2M: the market value is 36% above that estimate.
That is a factor of ×1.36. 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 €3.1M, 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.
- Apps
- 42
- Minutes
- 1,827
- Goals
- 0
- Assists
- 1
- Started
- 25/42
- Min / app
- 44
- Cards
- 5Y 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 Lavia…
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 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 1,687 midfielders
Dashed ring: the midfielder median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
18% this player0% midfielder median81st 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
- €1M
- Oct 2021
- Peak
- €50M
- Oct 2023
- Model target
- €22M
- Jun 2026
- Valuations
- 15
- 2 club changes
Jun 2026: €22M, Chelsea FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-10-05 | €1M | Manchester City U23 |
| 2022-06-15 | €2M | Manchester City U23 |
| 2022-09-15 | €25M | Southampton FC |
| 2022-11-03 | €25M | Southampton FC |
| 2023-06-20 | €32M | Southampton FC |
| 2023-10-09 | €50M | Chelsea FC |
| 2023-12-19 | €50M | Chelsea FC |
| 2024-03-14 | €40M | Chelsea FC |
| 2024-05-27 | €35M | Chelsea FC |
| 2024-12-16 | €40M | Chelsea FC |
| 2025-05-30 | €40M | Chelsea FC |
| 2025-10-17 | €35M | Chelsea FC |
| 2025-12-09 | €30M | Chelsea FC |
| 2026-03-09 | €25M | Chelsea FC |
| 2026-06-03 | €22M | Chelsea 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
- +0.305
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.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 90% of the 1,687 midfielders.
See them in the Explorer →Where Lavia appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SalahRWLiverpool FC · Premier League€22M
- SilvaAMManchester City · Premier League€22M
- Calvert-LewinCFLeeds United · Premier League€22M
- KrejciCBWolverhampton Wanderers · Premier League€22M
- AaronsonAMLeeds United · midfielders€22M
- FrattesiCMInter Milan · midfielders€22M
- RicciDMAC Milan · midfielders€22M
- KonstanteliasAMPAOK Thessaloniki · midfielders€22M
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).