Christos
Tzolis
LWGreece · Club Brugge KV
Image: FootyLogos
Player dossierPro League
ChristosTzolis
LWLeft WingerAttack
- Club
- Club Brugge KV
- League
- Pro League
- Nationality
- Greece
- Age
- 24
- Height
- 179 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Pro LeagueReading the valuation
The market values Tzolis at €40M. Model A, which never saw Tzolis during training, estimates €33M: the market value is 21% above that estimate.
That is a factor of ×1.21. 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 €59.4M, 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
- 91
- Minutes
- 7,308
- Goals
- 31
- Assists
- 37
- Started
- 85/91
- Min / app
- 80
- Cards
- 13Y 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 Tzolis…
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 €40M
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)
Minutes, last 365 days
Club minutes in the final year of the window: recent involvement, or the absence of it.
4,212 this player1,301 attacker 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
- €400k
- Aug 2020
- Peak
- €40M
- Jun 2026
- Model target
- €40M
- Jun 2026
- Valuations
- 18
- 5 club changes
Jun 2026: €40M, Club Brugge KV. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2020-08-04 | €400k | PAOK Thessaloniki |
| 2020-10-12 | €4M | PAOK Thessaloniki |
| 2021-02-12 | €10M | PAOK Thessaloniki |
| 2021-05-30 | €12M | PAOK Thessaloniki |
| 2021-12-23 | €10M | Norwich City |
| 2022-03-29 | €9M | Norwich City |
| 2022-06-15 | €8M | Norwich City |
| 2022-11-11 | €7M | FC Twente Enschede |
| 2023-06-01 | €5M | Norwich City |
| 2023-12-15 | €5M | Fortuna Düsseldorf |
| 2024-03-22 | €7M | Fortuna Düsseldorf |
| 2024-06-06 | €10M | Fortuna Düsseldorf |
| 2024-10-02 | €12M | Club Brugge KV |
| 2024-12-11 | €18M | Club Brugge KV |
| 2025-06-12 | €25M | Club Brugge KV |
| 2025-10-01 | €30M | Club Brugge KV |
| 2025-12-10 | €30M | Club Brugge KV |
| 2026-06-04 | €40M | Club Brugge KV |
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
- +0.194
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 →Pro League350 players · median €1.8M
The highest observed value among 350 Pro League players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 95% of the 1,583 attackers.
See them in the Explorer →Where Tzolis appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- KaretsasAMKRC Genk · Pro League€35M
- OrdóñezCBClub Brugge KV · Pro League€33M
- StankovićDMClub Brugge KV · Pro League€32M
- CatCMRSC Anderlecht · Pro League€27M
- RashfordLWFC Barcelona · attackers€40M
- PulisicRWAC Milan · attackers€40M
- LookmanLWAtlético de Madrid · attackers€40M
- SarrRWCrystal Palace · attackers€40M
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).