Apostolos
Christopoulos
CFGreece · AE Kifisia
Player dossierSuper League
ApostolosChristopoulos
CFCentre-ForwardAttack
- Club
- AE Kifisia
- League
- Super League
- Nationality
- Greece
- Age
- 23
- Height
- 186 cm
- Foot
- –
- Valued
- 4 Jun 2026
Reading the valuation
The market values Christopoulos at €300k. Model A, which never saw Christopoulos during training, estimates €452k: the market value is 34% below that estimate.
That is a factor of ×1.51. 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 €507k, 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
- 17
- Minutes
- 921
- Goals
- 3
- Assists
- 0
- Started
- 13/17
- Min / app
- 54
- Cards
- 5Y 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 Christopoulos…
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 €300k
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 1,583 attackers
Dashed ring: the attacker median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
76% this player59% attacker median78th 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
- €25k
- Dec 2021
- Peak
- €300k
- Jun 2026
- Model target
- €300k
- Jun 2026
- Valuations
- 12
- 3 club changes
Jun 2026: €300k, AE Kifisia. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-12-28 | €25k | AEK Athens B |
| 2022-06-27 | €25k | AEK Athens B |
| 2023-02-27 | €75k | AEK Athens B |
| 2023-06-19 | €125k | AEK Athens B |
| 2023-12-28 | €175k | AEK Athens B |
| 2024-03-13 | €200k | AEK Athens B |
| 2024-05-23 | €200k | AEK Athens B |
| 2024-12-27 | €200k | AE Kifisia |
| 2025-05-16 | €200k | AEK Athens B |
| 2025-12-12 | €200k | AE Kifisia |
| 2026-03-06 | €250k | AE Kifisia |
| 2026-06-04 | €300k | AE Kifisia |
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
- −0.411
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 20% of the 356 Super League players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 8% of the 1,583 attackers.
See them in the Explorer →Where Christopoulos appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- PaschalakisGKOlympiacos Piraeus · Super League€300k
- MavriasRBPanetolikos · Super League€300k
- BouchalakisCMPanetolikos · Super League€300k
- ChouchoumisLBAE Kifisia · Super League€300k
- TosunCFKasimpasa · attackers€300k
- ZabolotnyiCFSpartak Moscow · attackers€300k
- LinssenCFNEC Nijmegen · attackers€300k
- ForrestRWCeltic FC · attackers€300k
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).