Martin
Frydek
LBCzech Republic · Aris Thessaloniki
Player dossierSuper League
MartinFrydek
LBLeft-BackDefender
- Club
- Aris Thessaloniki
- League
- Super League
- Nationality
- Czech Republic
- Age
- 34
- Height
- 179 cm
- Foot
- Left
- Valued
- 4 Jun 2026
Super LeagueReading the valuation
The market values Frydek at €200k. Model A, which never saw Frydek during training, estimates €369k: the market value is 46% below that estimate.
That is a factor of ×1.85. 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 €349k, 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
- 35
- Minutes
- 2,041
- Goals
- 0
- Assists
- 1
- Started
- 24/35
- Min / app
- 58
- Cards
- 7Y 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 Frydek…
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 €200k
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)
European club minutes
Share of minutes played in UEFA club competitions.
3% this player0% defender median63rd 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
- €100k
- Jan 2012
- Peak
- €2.3M
- Oct 2016
- Model target
- €200k
- Jun 2026
- Valuations
- 38
- 5 club changes
Jun 2026: €200k, Aris Thessaloniki. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2012-01-06 | €100k | AC Sparta Prague |
| 2012-03-25 | €300k | AC Sparta Prague |
| 2012-12-10 | €300k | FK Senica (- 2022) |
| 2013-08-07 | €400k | FC Slovan Liberec |
| 2014-04-17 | €500k | FC Slovan Liberec |
| 2014-09-01 | €500k | FC Slovan Liberec |
| 2015-01-17 | €500k | FC Slovan Liberec |
| 2015-10-14 | €1M | AC Sparta Prague |
| 2016-03-18 | €1.5M | AC Sparta Prague |
| 2016-08-03 | €2M | AC Sparta Prague |
| 2016-10-16 | €2.3M | AC Sparta Prague |
| 2016-12-19 | €2.3M | AC Sparta Prague |
| 2017-06-10 | €2M | AC Sparta Prague |
| 2017-10-07 | €1.8M | AC Sparta Prague |
| 2017-12-21 | €1.8M | AC Sparta Prague |
| 2018-07-14 | €1.8M | AC Sparta Prague |
| 2018-10-29 | €2M | AC Sparta Prague |
| 2018-12-30 | €2M | AC Sparta Prague |
| 2019-06-25 | €1.8M | AC Sparta Prague |
| 2019-09-25 | €1.5M | AC Sparta Prague |
| 2019-12-07 | €1.8M | AC Sparta Prague |
| 2020-04-08 | €1.4M | AC Sparta Prague |
| 2020-07-10 | €1.4M | AC Sparta Prague |
| 2020-12-28 | €1.4M | FC Luzern |
| 2021-04-15 | €1M | FC Luzern |
| 2021-06-23 | €700k | FC Luzern |
| 2022-01-03 | €600k | FC Luzern |
| 2022-06-08 | €400k | FC Luzern |
| 2022-11-10 | €400k | FC Luzern |
| 2023-06-07 | €500k | FC Luzern |
| 2023-10-19 | €500k | FC Luzern |
| 2023-12-21 | €500k | FC Luzern |
| 2024-03-28 | €400k | FC Luzern |
| 2024-05-31 | €400k | FC Luzern |
| 2024-12-18 | €350k | Aris Thessaloniki |
| 2025-05-23 | €300k | Aris Thessaloniki |
| 2025-12-12 | €250k | Aris Thessaloniki |
| 2026-06-04 | €200k | Aris Thessaloniki |
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
- −0.613
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 10% of the 356 Super League players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 5% of the 2,065 defenders.
See them in the Explorer →Where Frydek appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- LoukinasCFNiki Volou · Super League€200k
- VillafañezAMAE Kifisia · Super League€200k
- GianniotasRWAris Thessaloniki · Super League€200k
- CallensCBAEK Athens · Super League€200k
- CaroleLBKayserispor · defenders€200k
- ZankaCBFC Copenhagen · defenders€200k
- BambaCBAngers SCO · defenders€200k
- ColemanRBEverton FC · defenders€200k
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).