Kosta
Nedeljkovic
RBSerbia · RB Leipzig
Player dossierBundesliga
KostaNedeljkovic
RBRight-BackDefender
- Club
- RB Leipzig
- League
- Bundesliga
- Nationality
- Serbia
- Age
- 20
- Height
- 184 cm
- Foot
- Right
- Valued
- 27 May 2026
BundesligaReading the valuation
The market values Nedeljkovic at €6M. Model A, which never saw Nedeljkovic during training, estimates €5.5M: 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 €2M, 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
- 25
- Minutes
- 1,013
- Goals
- 0
- Assists
- 0
- Started
- 10/25
- Min / app
- 41
- 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 Nedeljkovic…
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 €6M
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 2,065 defenders
Dashed ring: the defender median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
3% this player0% defender median64th 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
- €50k
- Jun 2023
- Peak
- €10M
- Jun 2025
- Model target
- €6M
- May 2026
- Valuations
- 9
- 3 club changes
May 2026: €6M, RB Leipzig. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2023-06-22 | €50k | Graficar Belgrad |
| 2023-12-27 | €2.5M | Red Star Belgrade |
| 2024-03-15 | €8M | Red Star Belgrade |
| 2024-06-10 | €8M | Red Star Belgrade |
| 2024-12-16 | €8.5M | Aston Villa |
| 2025-06-05 | €10M | RB Leipzig |
| 2025-12-19 | €8M | RB Leipzig |
| 2026-03-20 | €6M | RB Leipzig |
| 2026-05-27 | €6M | RB Leipzig |
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
- +0.094
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 53% of the 451 Bundesliga players.
See them in the Explorer →Defenders, all leagues2,065 players · median €2M
Valued above 73% of the 2,065 defenders.
See them in the Explorer →Where Nedeljkovic appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- SabitzerCMBorussia Dortmund · Bundesliga€6M
- FlekkenGKBayer 04 Leverkusen · Bundesliga€6M
- AndrichDMBayer 04 Leverkusen · Bundesliga€6M
- PoschCB1.FSV Mainz 05 · Bundesliga€6M
- RüdigerCBReal Madrid · defenders€6M
- DigneLBAston Villa · defenders€6M
- RomagnoliCBSS Lazio · defenders€6M
- SemedoRBFenerbahce · defenders€6M
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).