Serhat
Öztaşdelen
GKTürkiye · Kocaelispor
Player dossierSüper Lig
SerhatÖztaşdelen
GKGoalkeeperGoalkeeper
- Club
- Kocaelispor
- League
- Süper Lig
- Nationality
- Türkiye
- Age
- 21
- Height
- 188 cm
- Foot
- Right
- Valued
- 21 May 2026
Reading the valuation
The market values Öztaşdelen at €600k. Model A, which never saw Öztaşdelen during training, estimates €597k: the market value is level with that estimate.
That is a factor of ×1.00. 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 €632k, 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
- 7
- Minutes
- 630
- Started
- 7/7
- Min / app
- 90
- Cards
- 0Y 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 Öztaşdelen…
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 €600k
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 485 goalkeepers
Dashed ring: the goalkeeper median (50th percentile)
Starts
Share of appearances started rather than entered from the bench.
100% this player100% goalkeeper median62nd 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
- Jun 2021
- Peak
- €600k
- May 2026
- Model target
- €600k
- May 2026
- Valuations
- 13
- 1 club change
May 2026: €600k, Kocaelispor. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2021-06-02 | €25k | Altinordu FK |
| 2021-10-22 | €50k | Altinordu FK |
| 2022-01-17 | €75k | Altinordu FK |
| 2022-06-10 | €100k | Altinordu FK |
| 2022-11-15 | €100k | Altinordu FK |
| 2023-04-03 | €100k | Altinordu FK |
| 2023-06-23 | €100k | Altinordu FK |
| 2023-12-29 | €100k | Altinordu FK |
| 2024-06-03 | €75k | Altinordu FK |
| 2025-01-03 | €200k | Altinordu FK |
| 2025-06-20 | €200k | Altinordu FK |
| 2025-12-17 | €200k | Kocaelispor |
| 2026-05-21 | €600k | Kocaelispor |
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
- +0.005
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 →Süper Lig428 players · median €1.2M
Valued above 23% of the 428 Süper Lig players.
See them in the Explorer →Goalkeepers, all leagues485 players · median €1M
Valued above 32% of the 485 goalkeepers.
See them in the Explorer →Where Öztaşdelen appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- YalçınCBEyüpspor · Süper Lig€600k
- BulutRBBasaksehir FK · Süper Lig€600k
- AjetiCBBodrum FK · Süper Lig€600k
- LarssonAMFatih Karagümrük · Süper Lig€600k
- LeshchukGKDynamo Moscow · goalkeepers€600k
- GallonGKFCV Dender EH · goalkeepers€600k
- VasyutinGKAkron Tolyatti · goalkeepers€600k
- McCrorieGKEsbjerg fB · goalkeepers€600k
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).