Hjörtur
Hermannsson
CBIceland · Volos NFC
Player dossierSuper League
HjörturHermannsson
CBCentre-BackDefender
- Club
- Volos NFC
- League
- Super League
- Nationality
- Iceland
- Age
- 31
- Height
- 190 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Super LeagueReading the valuation
The market values Hermannsson at €400k. Model A, which never saw Hermannsson during training, estimates €480k: 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 €645k, 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
- 36
- Minutes
- 3,109
- Goals
- 1
- Assists
- 0
- Started
- 35/36
- Min / app
- 86
- Cards
- 9Y 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 Hermannsson…
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 €400k
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.
97% 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
- €50k
- Sept 2013
- Peak
- €1M
- Dec 2022
- Model target
- €400k
- Jun 2026
- Valuations
- 32
- 5 club changes
Jun 2026: €400k, Volos NFC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2013-09-13 | €50k | PSV Eindhoven U21 |
| 2014-02-10 | €250k | PSV Eindhoven U21 |
| 2014-08-15 | €200k | PSV Eindhoven U21 |
| 2015-02-21 | €200k | PSV Eindhoven U21 |
| 2015-07-01 | €200k | PSV Eindhoven U21 |
| 2015-11-11 | €250k | PSV Eindhoven U21 |
| 2016-02-05 | €200k | PSV Eindhoven U21 |
| 2016-06-01 | €300k | IFK Göteborg |
| 2016-08-12 | €400k | Bröndby IF |
| 2016-12-12 | €500k | Bröndby IF |
| 2017-03-27 | €700k | Bröndby IF |
| 2017-06-21 | €800k | Bröndby IF |
| 2017-12-18 | €700k | Bröndby IF |
| 2018-06-02 | €800k | Bröndby IF |
| 2018-12-21 | €600k | Bröndby IF |
| 2019-06-08 | €800k | Bröndby IF |
| 2019-12-22 | €800k | Bröndby IF |
| 2020-04-08 | €650k | Bröndby IF |
| 2020-07-31 | €700k | Bröndby IF |
| 2020-12-23 | €700k | Bröndby IF |
| 2021-06-04 | €800k | Bröndby IF |
| 2021-12-29 | €800k | Pisa Sporting Club |
| 2022-06-06 | €700k | Pisa Sporting Club |
| 2022-12-22 | €1M | Pisa Sporting Club |
| 2023-06-12 | €900k | Pisa Sporting Club |
| 2023-12-27 | €750k | Pisa Sporting Club |
| 2024-06-03 | €700k | Pisa Sporting Club |
| 2024-10-15 | €500k | Carrarese Calcio 1908 |
| 2024-12-23 | €400k | Carrarese Calcio 1908 |
| 2025-05-23 | €350k | Volos NFC |
| 2025-12-12 | €400k | Volos NFC |
| 2026-06-04 | €400k | Volos NFC |
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
- −0.182
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 →Super League356 players · median €600k
Valued above 29% of the 356 Super League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 14% of the 2,065 defenders.
See them in the Explorer →Where Hermannsson appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- LovrenCBPAOK Thessaloniki · Super League€400k
- ChoutesiotisGKAtromitos Athens · Super League€400k
- GarcíaCBPanetolikos · Super League€400k
- RosaLWPanetolikos · Super League€400k
- YoungRBIpswich Town · defenders€400k
- VogtCBVfL Bochum · defenders€400k
- SavicCBTrabzonspor · defenders€400k
- BrabecCBRio Ave FC · defenders€400k
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).