Hákon
Valdimarsson
GKIceland · Brentford FC
Image: FootyLogos
Player dossierPremier League
HákonValdimarsson
GKGoalkeeperGoalkeeper
- Club
- Brentford FC
- League
- Premier League
- Nationality
- Iceland
- Age
- 24
- Height
- 195 cm
- Foot
- Right
- Valued
- 3 Jun 2026
Premier LeagueReading the valuation
The market values Valdimarsson at €2.5M. Model A, which never saw Valdimarsson during training, estimates €4.8M: the market value is 48% below that estimate.
That is a factor of ×1.90. 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 €634k, 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
- 11
- Minutes
- 954
- Started
- 10/11
- Min / app
- 87
- Cards
- 0Y 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 Valdimarsson…
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 €2.5M
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 485 goalkeepers
Dashed ring: the goalkeeper median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
0% this player0% goalkeeper median32nd 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
- €25k
- Dec 2018
- Peak
- €2.5M
- Mar 2024
- Model target
- €2.5M
- Jun 2026
- Valuations
- 16
- 2 club changes
Jun 2026: €2.5M, Brentford FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2018-12-15 | €25k | ÍF Grótta |
| 2019-10-16 | €50k | ÍF Grótta |
| 2020-12-01 | €50k | ÍF Grótta |
| 2021-12-17 | €250k | IF Elfsborg |
| 2022-06-24 | €300k | IF Elfsborg |
| 2022-09-02 | €350k | IF Elfsborg |
| 2022-12-14 | €600k | IF Elfsborg |
| 2023-06-27 | €900k | IF Elfsborg |
| 2023-09-13 | €1.2M | IF Elfsborg |
| 2023-12-08 | €1.8M | IF Elfsborg |
| 2024-03-14 | €2.5M | Brentford FC |
| 2024-05-27 | €2.5M | Brentford FC |
| 2024-12-16 | €2.5M | Brentford FC |
| 2025-05-30 | €2.5M | Brentford FC |
| 2025-12-09 | €2.5M | Brentford FC |
| 2026-06-03 | €2.5M | Brentford 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
- −0.644
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 11% of the 555 Premier League players.
See them in the Explorer →Goalkeepers, all leagues485 players · median €1M
Valued above 64% of the 485 goalkeepers.
See them in the Explorer →Where Valdimarsson appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- GroßCMBrighton & Hove Albion · Premier League€2.5M
- McBurnieCFHull City · Premier League€2.5M
- PhillipsDMSheffield United · Premier League€2.5M
- KovacevicGKNorwich City · Premier League€2.5M
- BaumannGKTSG 1899 Hoffenheim · goalkeepers€2.5M
- RoefGKKAA Gent · goalkeepers€2.5M
- MvogoGKFC Lorient · goalkeepers€2.5M
- ZentnerGK1.FSV Mainz 05 · goalkeepers€2.5M
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).