FairValue

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Vernon de

Marco

CBSlovakia · Panserraikos

№ 355656Emerging €208k +0.18

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

Reading 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.

▲ +0.18A €208k▲ +0.07B €233k
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
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 API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €250kModel A €208k

Asking 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

Vernon de Marco's percentiles among defenders: Goals per 90 81st, Assists per 90 17th, Minutes, two years 36th, Starts 97th, Minutes, last 365 days 65th, European club minutes 30th81stGoals17thAssists36thMinutes97thStarts65thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player83% defender median97th percentile

18%peer deciles · median line · this player ●100%

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€250kPanserraikosValuation the model is trained to reproduce

Jun 2026: €250k, Panserraikos. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2015-12-14€150kZemplin Michalovce
2016-06-28€200kZemplin Michalovce
2016-12-31€250kZemplin Michalovce
2017-06-28€250kSlovan Bratislava
2018-01-16€200kLech Poznan
2018-07-03€150kLech Poznan
2019-01-25€200kLech Poznan
2019-06-29€350kLech Poznan
2019-12-15€600kSlovan Bratislava
2020-04-08€475kSlovan Bratislava
2020-07-10€450kSlovan Bratislava
2020-12-28€500kSlovan Bratislava
2021-06-26€500kSlovan Bratislava
2021-12-26€600kSlovan Bratislava
2022-06-23€600kSlovan Bratislava
2022-12-16€600kSlovan Bratislava
2023-06-21€600kSlovan Bratislava
2023-10-12€600kHatta Club
2024-03-08€600kHatta Club
2024-06-03€500kHatta Club
2024-09-24€450kApollon Limassol
2024-12-09€350kApollon Limassol
2025-05-29€300kApollon Limassol
2025-12-12€275kPanserraikos
2026-06-04€250kPanserraikos

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.

€20k€150k€1M€7.5M€250kSee them in the Explorer →

Defenders, all leagues2,065 players · median €2M

Valued above 7% of the 2,065 defenders.

€20k€200k€2M€20M€250kSee 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

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).