Jair
Cunha
CBBrazil · Nottingham Forest
Image: FootyLogos
Player dossierPremier League
JairCunha
CBCentre-BackDefender
- Club
- Nottingham Forest
- League
- Premier League
- Nationality
- Brazil
- Age
- 21
- Height
- 198 cm
- Foot
- Both
- Valued
- 3 Jun 2026
Premier LeagueReading the valuation
The market values Cunha at €15M. Model A, which never saw Cunha during training, estimates €11.7M: the market value is 28% above that estimate.
That is a factor of ×1.28. 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 €8.1M, 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
- 19
- Minutes
- 1,312
- Goals
- 1
- Assists
- 0
- Started
- 15/19
- Min / app
- 69
- 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 Cunha…
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 €15M
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)
European club minutes
Share of minutes played in UEFA club competitions.
48% this player0% defender median99th 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
- €100k
- Aug 2022
- Peak
- €15M
- Jun 2026
- Model target
- €15M
- Jun 2026
- Valuations
- 9
- 3 club changes
Jun 2026: €15M, Nottingham Forest. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2022-08-19 | €100k | Unknown |
| 2022-11-14 | €100k | Unknown |
| 2023-12-11 | €200k | Unknown |
| 2024-04-18 | €200k | Santos FC |
| 2024-11-27 | €5M | Santos FC |
| 2025-03-28 | €10M | Botafogo de Futebol e Regatas |
| 2025-06-06 | €13M | Botafogo de Futebol e Regatas |
| 2025-12-09 | €12M | Nottingham Forest |
| 2026-06-03 | €15M | Nottingham Forest |
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
- +0.249
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 43% of the 555 Premier League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 87% of the 2,065 defenders.
See them in the Explorer →Where Cunha appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- AlissonGKLiverpool FC · Premier League€15M
- DijkCBLiverpool FC · Premier League€15M
- PalhinhaDMTottenham Hotspur · Premier League€15M
- BoscagliCBBrighton & Hove Albion · Premier League€15M
- ManciniCBAS Roma · defenders€15M
- NiakhatéCBOlympique Lyon · defenders€15M
- ChabotCBVfB Stuttgart · defenders€15M
- TreuRBSC Freiburg · defenders€15M
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).