Christos
Zafeiris
CMGreece · PAOK Thessaloniki
Player dossierSuper League
ChristosZafeiris
CMCentral MidfieldMidfield
- Club
- PAOK Thessaloniki
- League
- Super League
- Nationality
- Greece
- Age
- 23
- Height
- 173 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Reading the valuation
The market values Zafeiris at €11M. Model A, which never saw Zafeiris during training, estimates €3.2M: the market value is 240% above that estimate.
That is a factor of ×3.40. 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 €6M, 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
- 2,559
- Goals
- 1
- Assists
- 2
- Started
- 28/35
- Min / app
- 73
- 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 Zafeiris…
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 €11M
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)
European club minutes
Share of minutes played in UEFA club competitions.
59% this player0% midfielder median100th 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
- €50k
- Jul 2020
- Peak
- €11M
- Dec 2024
- Model target
- €11M
- Jun 2026
- Valuations
- 15
- 3 club changes
Jun 2026: €11M, PAOK Thessaloniki. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-07-25 | €50k | Grorud IL |
| 2020-12-31 | €100k | Grorud IL |
| 2022-01-03 | €300k | FK Haugesund |
| 2022-07-01 | €600k | FK Haugesund |
| 2022-12-09 | €1.5M | FK Haugesund |
| 2023-06-20 | €2.5M | SK Slavia Prague |
| 2023-09-20 | €4.5M | SK Slavia Prague |
| 2023-12-20 | €5M | SK Slavia Prague |
| 2024-03-27 | €7M | SK Slavia Prague |
| 2024-06-05 | €7M | SK Slavia Prague |
| 2024-09-27 | €8.5M | SK Slavia Prague |
| 2024-12-20 | €11M | SK Slavia Prague |
| 2025-06-17 | €11M | SK Slavia Prague |
| 2025-12-22 | €11M | SK Slavia Prague |
| 2026-06-04 | €11M | PAOK 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
- +1.225
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
Joint 5th highest observed value among 356 Super League players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 81% of the 1,687 midfielders.
See them in the Explorer →Where Zafeiris appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- PirolaCBOlympiacos Piraeus · Super League€11M
- JovićCFAEK Athens · Super League€9M
- HezzeDMOlympiacos Piraeus · Super League€14M
- ZivkovicRWPAOK Thessaloniki · Super League€8M
- CookCMAFC Bournemouth · midfielders€11M
- MatusiwaDMIpswich Town · midfielders€11M
- MuciAMTrabzonspor · midfielders€11M
- SteijnAMFeyenoord Rotterdam · midfielders€11M
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).