Eric
Martel
DMGermany · 1.FC Köln
Player dossierBundesliga
EricMartel
DMDefensive MidfieldMidfield
- Club
- 1.FC Köln
- League
- Bundesliga
- Nationality
- Germany
- Age
- 24
- Height
- 188 cm
- Foot
- Right
- Valued
- 27 May 2026
Reading the valuation
The market values Martel at €8M. Model A, which never saw Martel during training, estimates €11.3M: the market value is 29% below that estimate.
That is a factor of ×1.41. 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 €3.4M, 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
- 33
- Minutes
- 2,744
- Goals
- 3
- Assists
- 2
- Started
- 32/33
- Min / app
- 83
- 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 Martel…
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 €8M
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.
97% this player69% midfielder median96th 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
- Jan 2021
- Peak
- €9M
- Jun 2023
- Model target
- €8M
- May 2026
- Valuations
- 17
- 1 club change
May 2026: €8M, 1.FC Köln. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-01-16 | €200k | Austria Vienna |
| 2021-03-24 | €1M | Austria Vienna |
| 2021-06-02 | €1.8M | Austria Vienna |
| 2021-12-16 | €2M | Austria Vienna |
| 2022-05-27 | €3M | Austria Vienna |
| 2022-09-21 | €2M | 1.FC Köln |
| 2022-11-09 | €4M | 1.FC Köln |
| 2023-03-29 | €6.5M | 1.FC Köln |
| 2023-06-22 | €9M | 1.FC Köln |
| 2023-12-14 | €9M | 1.FC Köln |
| 2024-05-29 | €7.5M | 1.FC Köln |
| 2024-09-25 | €6M | 1.FC Köln |
| 2024-12-19 | €6M | 1.FC Köln |
| 2025-06-19 | €6M | 1.FC Köln |
| 2025-10-14 | €8M | 1.FC Köln |
| 2025-12-19 | €8M | 1.FC Köln |
| 2026-05-27 | €8M | 1.FC Köln |
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
- −0.342
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 60% of the 451 Bundesliga players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 74% of the 1,687 midfielders.
See them in the Explorer →Where Martel appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- ElvediCBBorussia Mönchengladbach · Bundesliga€8M
- KleindienstCFBorussia Mönchengladbach · Bundesliga€8M
- KarazorDMVfB Stuttgart · Bundesliga€8M
- NicolasGKBorussia Mönchengladbach · Bundesliga€8M
- BruyneAMSSC Napoli · midfielders€8M
- XhakaDMSunderland AFC · midfielders€8M
- FofanaCMFC Porto · midfielders€8M
- ChristieCMAFC Bournemouth · midfielders€8M
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).