Sergiy
Kosovskyi
DMUkraine · Livyi Bereg Kyiv
Player dossierPremier Liha
SergiyKosovskyi
DMDefensive MidfieldMidfield
- Club
- Livyi Bereg Kyiv
- League
- Premier Liha
- Nationality
- Ukraine
- Age
- 27
- Height
- 184 cm
- Foot
- Right
- Valued
- 18 Dec 2025
Reading the valuation
The market values Kosovskyi at €200k. Model A, which never saw Kosovskyi during training, estimates €297k: the market value is 33% below that estimate.
That is a factor of ×1.49. 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 €961k, 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
- 29
- Minutes
- 1,737
- Goals
- 0
- Assists
- 1
- Started
- 18/29
- Min / app
- 60
- Cards
- 1Y 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 Kosovskyi…
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 €200k
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)
Starts
Share of appearances started rather than entered from the bench.
62% this player69% midfielder median37th 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
- Dec 2018
- Peak
- €300k
- Jun 2024
- Model target
- €200k
- Dec 2025
- Valuations
- 14
- 4 club changes
Dec 2025: €200k, Livyi Bereg Kyiv. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2018-12-02 | €25k | Obolon-Brovar Kyiv |
| 2019-06-16 | €50k | Obolon-Brovar Kyiv |
| 2020-08-18 | €50k | Agrobiznes Volochysk |
| 2020-12-05 | €50k | Agrobiznes Volochysk |
| 2021-06-17 | €25k | Agrobiznes Volochysk |
| 2021-12-06 | €50k | VPK-Agro |
| 2022-05-18 | €50k | VPK-Agro |
| 2022-12-06 | €25k | Obolon Kyiv |
| 2023-06-21 | €100k | Obolon Kyiv |
| 2023-12-11 | €200k | Obolon Kyiv |
| 2024-06-06 | €300k | Obolon Kyiv |
| 2024-12-17 | €200k | Livyi Bereg Kyiv |
| 2025-06-10 | €200k | Livyi Bereg Kyiv |
| 2025-12-18 | €200k | Livyi Bereg Kyiv |
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
- −0.396
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 →Premier Liha414 players · median €400k
Valued above 10% of the 414 Premier Liha players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 3% of the 1,687 midfielders.
See them in the Explorer →Where Kosovskyi appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- ChurkoAMMetalist 1925 Kharkiv · Premier Liha€200k
- TsurikovLBKolos Kovalivka · Premier Liha€200k
- TaranukhaCFKolos Kovalivka · Premier Liha€200k
- ShabanovCBMetalist 1925 Kharkiv · Premier Liha€200k
- CazorlaCMReal Oviedo · midfielders€200k
- KvekveskiriDMFC Orenburg · midfielders€200k
- VillafañezAMAE Kifisia · midfielders€200k
- ArmstrongCMAberdeen FC · midfielders€200k
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).