Sivert Heltne
Nilsen
DMNorway · Aberdeen FC
Player dossierPremiership
Sivert HeltneNilsen
DMDefensive MidfieldMidfield
- Club
- Aberdeen FC
- League
- Premiership
- Nationality
- Norway
- Age
- 34
- Height
- 185 cm
- Foot
- Right
- Valued
- 10 Dec 2025
PremiershipReading the valuation
The market values Nilsen at €250k. Model A, which never saw Nilsen during training, estimates €116k: the market value is 115% above that estimate.
That is a factor of ×2.15. 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 €576k, 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
- 37
- Minutes
- 2,714
- Goals
- 0
- Assists
- 1
- Started
- 34/37
- Min / app
- 73
- Cards
- 11Y 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 Nilsen…
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 €250k
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)
Starts
Share of appearances started rather than entered from the bench.
92% this player69% midfielder median89th 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
- €200k
- Feb 2012
- Peak
- €900k
- Dec 2020
- Model target
- €250k
- Dec 2025
- Valuations
- 22
- 7 club changes
Dec 2025: €250k, Aberdeen FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-02-02 | €200k | IL Hødd |
| 2012-07-25 | €200k | IL Hødd |
| 2013-12-02 | €200k | IL Hødd |
| 2014-12-07 | €700k | Vålerenga Fotball Elite |
| 2015-12-27 | €500k | SK Brann |
| 2016-12-18 | €600k | SK Brann |
| 2017-12-23 | €600k | SK Brann |
| 2018-12-21 | €500k | AC Horsens |
| 2019-06-08 | €500k | AC Horsens |
| 2019-11-20 | €700k | IF Elfsborg |
| 2020-04-08 | €550k | IF Elfsborg |
| 2020-08-05 | €500k | IF Elfsborg |
| 2020-12-10 | €900k | IF Elfsborg |
| 2021-06-07 | €900k | KVRS Waasland - SK Beveren |
| 2022-01-03 | €600k | SK Brann |
| 2022-12-09 | €500k | SK Brann |
| 2023-06-29 | €500k | SK Brann |
| 2023-12-15 | €500k | SK Brann |
| 2024-06-12 | €450k | SK Brann |
| 2024-12-03 | €400k | Aberdeen FC |
| 2025-06-17 | €300k | Aberdeen FC |
| 2025-12-10 | €250k | Aberdeen 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
- +0.767
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 →Premiership311 players · median €400k
Valued above 32% of the 311 Premiership players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 5% of the 1,687 midfielders.
See them in the Explorer →Where Nilsen appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- FraserRBSt. Mirren FC · Premiership€250k
- SibbaldDMDundee United FC · Premiership€250k
- GordonCBMotherwell FC · Premiership€250k
- KiltieLWKilmarnock FC · Premiership€250k
- FalkCMOdense Boldklub · midfielders€250k
- BabenkoCMPolissya Zhytomyr · midfielders€250k
- SydorchukDMKVC Westerlo · midfielders€250k
- StambouliDMFC Metz · midfielders€250k
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).