Matej
Sin
AMCzech Republic · AZ Alkmaar
Player dossierEredivisie
MatejSin
AMAttacking MidfieldMidfield
- Club
- AZ Alkmaar
- League
- Eredivisie
- Nationality
- Czech Republic
- Age
- 21
- Height
- 180 cm
- Foot
- –
- Valued
- 28 May 2026
EredivisieReading the valuation
The market values Sin at €3M. Model A, which never saw Sin during training, estimates €2.1M: the market value is 44% above that estimate.
That is a factor of ×1.44. 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 €2.3M, closer to the market here, although it is usually further off (typical miss ×2.07).
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 30
- Minutes
- 1,307
- Goals
- 3
- Assists
- 3
- Started
- 15/30
- Min / app
- 44
- Cards
- 2Y 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 Sin…
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 €3M
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.
52% this player0% midfielder median99th 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
- Jun 2023
- Peak
- €4.5M
- Jun 2025
- Model target
- €3M
- May 2026
- Valuations
- 10
- 1 club change
May 2026: €3M, AZ Alkmaar. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2023-06-20 | €250k | FC Banik Ostrava |
| 2023-09-20 | €350k | FC Banik Ostrava |
| 2023-12-20 | €350k | FC Banik Ostrava |
| 2024-03-27 | €1M | FC Banik Ostrava |
| 2024-06-05 | €1.5M | FC Banik Ostrava |
| 2024-12-20 | €3M | FC Banik Ostrava |
| 2025-04-01 | €4M | FC Banik Ostrava |
| 2025-06-17 | €4.5M | FC Banik Ostrava |
| 2025-12-02 | €4M | AZ Alkmaar |
| 2026-05-28 | €3M | AZ Alkmaar |
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
- +0.367
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 →Eredivisie425 players · median €1M
Valued above 70% of the 425 Eredivisie players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 56% of the 1,687 midfielders.
See them in the Explorer →Where Sin appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SterlingRWFeyenoord Rotterdam · Eredivisie€3M
- BarkasGKFC Utrecht · Eredivisie€3M
- JusteCBFeyenoord Rotterdam · Eredivisie€3M
- HoremansRBFC Utrecht · Eredivisie€3M
- MkhitaryanCMInter Milan · midfielders€3M
- GötzeAMEintracht Frankfurt · midfielders€3M
- AndréDMLOSC Lille · midfielders€3M
- ArnoldCMVfL Wolfsburg · midfielders€3M
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).