FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Doğucan

Haspolat

DMTürkiye · KVC Westerlo

№ 387143Established €5.3M −0.05

Player dossierPro League

DoğucanHaspolat

DMDefensive MidfieldMidfield

Club
KVC Westerlo
League
Pro League
Nationality
Türkiye
Age
26
Height
177 cm
Foot
Right
Valued
4 Jun 2026

Reading the valuation

The market values Haspolat at €5M. Model A, which never saw Haspolat during training, estimates €5.3M: the market value is 5% below that estimate.

That is a factor of ×1.05. 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 €7.8M, 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.

▼ −0.05A €5.3M▼ −0.45B €7.8M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
67
Minutes
6,000
Goals
4
Assists
11
Started
67/67
Min / app
90
Cards
15Y 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 Haspolat…

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 €5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €5MModel A €5.3M

Asking 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

Doğucan Haspolat's percentiles among midfielders: Goals per 90 38th, Assists per 90 75th, Minutes, two years 95th, Starts 99th, Minutes, last 365 days 96th, European club minutes 30th38thGoals75thAssists95thMinutes99thStarts96thRecent30thEurope

Dashed ring: the midfielder median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player69% midfielder median99th percentile

7%peer deciles · median line · this player ●100%

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 2016
Peak
€5M
Mar 2025
Model target
€5M
Jun 2026
Valuations
29
3 club changes
Jun 2026€5MKVC WesterloValuation the model is trained to reproduce

Jun 2026: €5M, KVC Westerlo. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2016-07-01€50kSBV Excelsior
2017-01-18€100kSBV Excelsior
2017-06-07€200kSBV Excelsior
2018-01-17€250kSBV Excelsior
2018-06-12€250kSBV Excelsior
2018-12-28€350kSBV Excelsior
2019-06-12€350kSBV Excelsior
2020-04-08€325kKasimpasa
2020-08-04€325kKasimpasa
2020-12-23€300kKasimpasa
2021-03-16€400kKasimpasa
2021-05-21€400kKasimpasa
2021-10-12€400kKasimpasa
2022-01-04€525kKasimpasa
2022-03-31€1.4MKasimpasa
2022-06-01€2MKasimpasa
2022-09-13€2.5MTrabzonspor
2022-10-27€2.5MTrabzonspor
2023-03-14€2.4MTrabzonspor
2023-06-08€2.4MTrabzonspor
2023-12-19€1.8MKVC Westerlo
2024-03-22€1.2MKVC Westerlo
2024-06-04€1.2MKVC Westerlo
2024-10-02€2.2MKVC Westerlo
2024-12-11€4MKVC Westerlo
2025-03-26€5MKVC Westerlo
2025-06-12€5MKVC Westerlo
2025-12-10€5MKVC Westerlo
2026-06-04€5MKVC Westerlo

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
−0.053

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

Valued above 85% of the 350 Pro League players.

€100k€750k€5M€30M€5MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 65% of the 1,687 midfielders.

€20k€200k€2M€20M€5MSee them in the Explorer →

Where Haspolat appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

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).