Vernon de
Marco
CBSlovakia · Panserraikos
Player dossierSuper League
Vernon deMarco
CBCentre-BackDefender
- Club
- Panserraikos
- League
- Super League
- Nationality
- Slovakia
- Age
- 33
- Height
- 186 cm
- Foot
- Left
- Valued
- 4 Jun 2026
Super LeagueReading the valuation
The market values Marco at €250k. Model A, which never saw Marco during training, estimates €208k: the market value is 20% above 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 €233k, 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
- 24
- Minutes
- 2,114
- Goals
- 2
- Assists
- 0
- Started
- 24/24
- Min / app
- 88
- Cards
- 6Y 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 Marco…
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 2,065 defenders
Dashed ring: the defender median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
100% this player83% defender median97th 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
- €150k
- Dec 2015
- Peak
- €600k
- Dec 2019
- Model target
- €250k
- Jun 2026
- Valuations
- 25
- 6 club changes
Jun 2026: €250k, Panserraikos. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2015-12-14 | €150k | Zemplin Michalovce |
| 2016-06-28 | €200k | Zemplin Michalovce |
| 2016-12-31 | €250k | Zemplin Michalovce |
| 2017-06-28 | €250k | Slovan Bratislava |
| 2018-01-16 | €200k | Lech Poznan |
| 2018-07-03 | €150k | Lech Poznan |
| 2019-01-25 | €200k | Lech Poznan |
| 2019-06-29 | €350k | Lech Poznan |
| 2019-12-15 | €600k | Slovan Bratislava |
| 2020-04-08 | €475k | Slovan Bratislava |
| 2020-07-10 | €450k | Slovan Bratislava |
| 2020-12-28 | €500k | Slovan Bratislava |
| 2021-06-26 | €500k | Slovan Bratislava |
| 2021-12-26 | €600k | Slovan Bratislava |
| 2022-06-23 | €600k | Slovan Bratislava |
| 2022-12-16 | €600k | Slovan Bratislava |
| 2023-06-21 | €600k | Slovan Bratislava |
| 2023-10-12 | €600k | Hatta Club |
| 2024-03-08 | €600k | Hatta Club |
| 2024-06-03 | €500k | Hatta Club |
| 2024-09-24 | €450k | Apollon Limassol |
| 2024-12-09 | €350k | Apollon Limassol |
| 2025-05-29 | €300k | Apollon Limassol |
| 2025-12-12 | €275k | Panserraikos |
| 2026-06-04 | €250k | Panserraikos |
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
- +0.184
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 15% of the 356 Super League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 7% of the 2,065 defenders.
See them in the Explorer →Where Marco appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- KarelisCFPanserraikos · Super League€250k
- TaisonLWPAOK Thessaloniki · Super League€250k
- MladenCBPanetolikos · Super League€250k
- LodyginGKLevadiakos · Super League€250k
- AanholtLBSparta Rotterdam · defenders€250k
- PintoRBFortuna Sittard · defenders€250k
- RakitskyiCBChornomorets Odesa · defenders€250k
- PetrovRBFC Krasnodar · defenders€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).