Ibrahim
Maza
AMAlgeria · Bayer 04 Leverkusen
Image: FootyLogos
Player dossierBundesliga
IbrahimMaza
AMAttacking MidfieldMidfield
- Club
- Bayer 04 Leverkusen
- League
- Bundesliga
- Nationality
- Algeria
- Age
- 20
- Height
- 180 cm
- Foot
- Right
- Valued
- 27 May 2026
BundesligaReading the valuation
The market values Maza at €45M. Model A, which never saw Maza during training, estimates €41M: the market value is 10% above that estimate.
That is a factor of ×1.10. 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 €22.5M, 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
- 44
- Minutes
- 2,944
- Goals
- 5
- Assists
- 7
- Started
- 32/44
- Min / app
- 67
- Cards
- 3Y 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 Maza…
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 €45M
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.
27% this player0% midfielder median93rd 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
- €250k
- Mar 2023
- Peak
- €45M
- May 2026
- Model target
- €45M
- May 2026
- Valuations
- 11
- 2 club changes
May 2026: €45M, Bayer 04 Leverkusen. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2023-03-27 | €250k | Hertha BSC U19 |
| 2023-06-19 | €600k | Hertha BSC U19 |
| 2023-12-15 | €600k | Hertha BSC |
| 2024-03-22 | €1.5M | Hertha BSC |
| 2024-06-06 | €5M | Hertha BSC |
| 2024-09-25 | €8M | Hertha BSC |
| 2024-12-19 | €12M | Hertha BSC |
| 2025-06-19 | €12M | Hertha BSC |
| 2025-12-19 | €25M | Bayer 04 Leverkusen |
| 2026-03-20 | €40M | Bayer 04 Leverkusen |
| 2026-05-27 | €45M | Bayer 04 Leverkusen |
Audit context group-level, not about this player
- Audit group
- non-UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- +0.093
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 96% of the 451 Bundesliga players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 97% of the 1,687 midfielders.
See them in the Explorer →Where Maza appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- StillerDMVfB Stuttgart · Bundesliga€45M
- QuansahCBBayer 04 Leverkusen · Bundesliga€45M
- UzunAMEintracht Frankfurt · Bundesliga€45M
- MalaLW1.FC Köln · Bundesliga€45M
- HjulmandDMSporting CP · midfielders€45M
- OnanaDMAston Villa · midfielders€45M
- GarnerDMEverton FC · midfielders€45M
- ÉdersonCMAtalanta BC · midfielders€45M
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).