Konstantinos
Stamoulis
RBGreece · NK Veres Rivne
Player dossierPremier Liha
KonstantinosStamoulis
RBRight-BackDefender
- Club
- NK Veres Rivne
- League
- Premier Liha
- Nationality
- Greece
- Age
- 25
- Height
- 173 cm
- Foot
- Right
- Valued
- 2 Jun 2026
Premier LihaReading the valuation
The market values Stamoulis at €700k. Model A, which never saw Stamoulis during training, estimates €387k: the market value is 81% above that estimate.
That is a factor of ×1.81. 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 €927k, closer to the market here, although it is usually further off (typical miss ×2.07).
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 29
- Minutes
- 2,589
- Goals
- 1
- Assists
- 0
- Started
- 28/29
- Min / app
- 89
- Cards
- 3Y 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 Stamoulis…
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 €700k
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 median88th 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 2019
- Peak
- €700k
- Jun 2026
- Model target
- €700k
- Jun 2026
- Valuations
- 16
- 5 club changes
Jun 2026: €700k, NK Veres Rivne. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-09-23 | €50k | AEK Athens |
| 2019-12-18 | €50k | AEK Athens |
| 2020-10-12 | €50k | PAS Lamia 1964 |
| 2021-02-12 | €50k | PAS Lamia 1964 |
| 2021-12-28 | €125k | AEK Athens B |
| 2022-06-27 | €150k | AEK Athens B |
| 2023-02-27 | €150k | AEK Athens B |
| 2023-06-19 | €150k | AEK Athens B |
| 2023-12-28 | €225k | Othellos Athienou |
| 2024-03-26 | €250k | Othellos Athienou |
| 2024-05-17 | €250k | Othellos Athienou |
| 2024-12-09 | €250k | Anorthosis Famagusta |
| 2025-05-29 | €325k | Anorthosis Famagusta |
| 2025-09-10 | €400k | NK Veres Rivne |
| 2025-12-18 | €600k | NK Veres Rivne |
| 2026-06-02 | €700k | NK Veres Rivne |
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
- +0.592
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 Liha414 players · median €400k
Valued above 67% of the 414 Premier Liha players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 26% of the 2,065 defenders.
See them in the Explorer →Where Stamoulis appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- ShepelevCMPolissya Zhytomyr · Premier Liha€700k
- VantukhLBZorya Lugansk · Premier Liha€700k
- KlymchukCFKolos Kovalivka · Premier Liha€700k
- VítorLWKarpaty Lviv · Premier Liha€700k
- AlbiolCBPisa Sporting Club · defenders€700k
- D'AmbrosioCBAC Monza · defenders€700k
- FemeníaRBGetafe CF · defenders€700k
- AppiahRBAS Saint-Étienne · defenders€700k
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).