Fotis
Ioannidis
CFGreece · Sporting CP
Image: FootyLogos
Player dossierLiga Portugal
FotisIoannidis
CFCentre-ForwardAttack
- Club
- Sporting CP
- League
- Liga Portugal
- Nationality
- Greece
- Age
- 26
- Height
- 187 cm
- Foot
- Both
- Valued
- 28 May 2026
Liga PortugalReading the valuation
The market values Ioannidis at €16M. Model A, which never saw Ioannidis during training, estimates €7.5M: the market value is 114% above that estimate.
That is a factor of ×2.14. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.
Without league and club, Model B estimates €4.6M, 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
- 54
- Minutes
- 3,223
- Goals
- 10
- Assists
- 3
- Started
- 34/54
- Min / app
- 60
- Cards
- 5Y 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 Ioannidis…
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 €16M
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 1,583 attackers
Dashed ring: the attacker median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
25% this player0% attacker median89th 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
- Dec 2017
- Peak
- €22M
- Sept 2025
- Model target
- €16M
- May 2026
- Valuations
- 23
- 2 club changes
May 2026: €16M, Sporting CP. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2017-12-18 | €50k | Levadiakos |
| 2018-05-22 | €150k | Levadiakos |
| 2018-12-07 | €150k | Levadiakos |
| 2019-05-21 | €300k | Levadiakos |
| 2020-10-12 | €400k | Panathinaikos |
| 2021-02-12 | €600k | Panathinaikos |
| 2021-05-30 | €800k | Panathinaikos |
| 2021-11-01 | €800k | Panathinaikos |
| 2022-06-09 | €1.2M | Panathinaikos |
| 2022-11-07 | €1.2M | Panathinaikos |
| 2023-02-27 | €1.5M | Panathinaikos |
| 2023-05-22 | €2.5M | Panathinaikos |
| 2023-09-21 | €3.5M | Panathinaikos |
| 2023-12-20 | €9M | Panathinaikos |
| 2024-03-06 | €10M | Panathinaikos |
| 2024-05-30 | €13M | Panathinaikos |
| 2024-09-26 | €18M | Panathinaikos |
| 2024-12-18 | €18M | Panathinaikos |
| 2025-05-23 | €15M | Panathinaikos |
| 2025-09-30 | €22M | Sporting CP |
| 2025-12-18 | €20M | Sporting CP |
| 2026-03-19 | €18M | Sporting CP |
| 2026-05-28 | €16M | Sporting CP |
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
- +0.760
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 →Liga Portugal423 players · median €1M
Valued above 91% of the 423 Liga Portugal players.
See them in the Explorer →Attackers, all leagues1,583 players · median €2.5M
Valued above 84% of the 1,583 attackers.
See them in the Explorer →Where Ioannidis appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- DedićRBSL Benfica · Liga Portugal€16M
- QuaresmaCBSporting CP · Liga Portugal€17M
- PepêRWFC Porto · Liga Portugal€17M
- AursnesCMSL Benfica · Liga Portugal€15M
- BuendíaLWAston Villa · attackers€16M
- GnontoRWLeeds United · attackers€16M
- MayendaCFSunderland AFC · attackers€16M
- DoanRWEintracht Frankfurt · attackers€17M
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).