FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

David

Nemeth

CBAustria · FC St. Pauli

№ 451906Established €1.5M +0.49

Player dossierBundesliga

DavidNemeth

CBCentre-BackDefender

Club
FC St. Pauli
League
Bundesliga
Nationality
Austria
Age
25
Height
191 cm
Foot
Both
Valued
27 May 2026

Reading the valuation

The market values Nemeth at €2.5M. Model A, which never saw Nemeth during training, estimates €1.5M: the market value is 63% above that estimate.

That is a factor of ×1.63. 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 €1.7M, 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.

▲ +0.49A €1.5M▲ +0.37B €1.7M
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
25
Minutes
2,262
Goals
0
Assists
1
Started
25/25
Min / app
90
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 Nemeth…

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 €2.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2.5MModel A €1.5M

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

David Nemeth's percentiles among defenders: Goals per 90 18th, Assists per 90 50th, Minutes, two years 39th, Starts 97th, Minutes, last 365 days 4th, European club minutes 30th18thGoals50thAssists39thMinutes97thStarts4thRecent30thEurope

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
€250k
Jul 2019
Peak
€4M
Jun 2021
Model target
€2.5M
May 2026
Valuations
23
5 club changes
May 2026€2.5MFC St. PauliValuation the model is trained to reproduce

May 2026: €2.5M, FC St. Pauli. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2019-07-02€250kSV Mattersburg
2019-12-16€250kSV Mattersburg
2020-07-22€450kSV Mattersburg (-2020)
2020-09-15€450k1.FSV Mainz 05 II
2020-12-21€1MSK Sturm Graz
2021-03-24€2MSK Sturm Graz
2021-06-02€4MSK Sturm Graz
2021-12-22€4M1.FSV Mainz 05
2022-03-24€3M1.FSV Mainz 05
2022-06-09€2.3M1.FSV Mainz 05
2022-09-28€2MFC St. Pauli
2022-11-30€2MFC St. Pauli
2023-06-28€1.5MFC St. Pauli
2023-10-20€1.2MFC St. Pauli
2023-12-15€1MFC St. Pauli
2024-03-22€800kFC St. Pauli
2024-06-06€800kFC St. Pauli
2024-12-20€1MFC St. Pauli
2025-03-27€2.5MFC St. Pauli
2025-06-05€4MFC St. Pauli
2025-12-19€4MFC St. Pauli
2026-03-20€3MFC St. Pauli
2026-05-27€2.5MFC St. Pauli

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
+0.491

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 →

Bundesliga451 players · median €5M

Valued above 25% of the 451 Bundesliga players.

€300k€2M€15M€100M€2.5MSee them in the Explorer →

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

Valued above 54% of the 2,065 defenders.

€20k€200k€2M€20M€2.5MSee them in the Explorer →

Where Nemeth 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).