Konstantinos Tzolakis

23 yrs · Goalkeeper · Greece
Olympiakos Syndesmos Filathlon Peiraios · Super League 1 · Foot: both · Height: 193 cm
Risk: ModerateConfidence: MediumSample: HighDevelopment: ModerateContract: until 30 Jun 2027
Market value
€18.0M
Updated today
Estimated acquisition
€8.2M – €21.3M
Estimated · 20–80% range
Model value
€2.4M – €20.2M
Performance-implied · estimated
Projected (24m)
€8.8M – €31.8M
Resale range · estimated
Potential value gap
-€18.9M – €12.0M
Model value − acquisition

Value picture

Where the market, the likely price and the model estimates sit.

Estimated acquisition€8.2M – €21.3M
Model value (performance-implied)€2.4M – €20.2M
Projected value (24 months)€8.8M – €31.8M
Dashed line: current market value (€18.0M). Bars are 20–80% model ranges; tick = median.

The model rates Konstantinos Tzolakis's performance-implied value at EUR 2.4M-20.2M, above the estimated acquisition range of EUR 8.2M-21.3M. Its 24-month market value projection is EUR 8.8M-31.8M. Confidence is medium: no event-level data (xG, progressive actions) is available from the current free source, and injury history is unavailable.

Acquisition note: Final year of contract: selling club's leverage is reduced.

Bargain Index: 99

What drives the score. Not a black box: each component and its level.

PerformanceHigh78.5th pct among GK peers (age-neutral)
AgeFavorable23.6 years
Acquisition costFavorableest. €11.0M vs market €18.0M
Expected appreciationHigh+29% over ~2 years (model)
Value gapSmallweak predictor on its own
DevelopmentModerate
League translationUncertainleague coefficient 0.43
Tactical fitNot evaluatedRequires event/role data not available from the current free source.
RiskModerate
Data confidenceMedium

Bargain Index = percentile (among all evaluated players) of expected 2-year value relative to estimated cost. See methodology and backtests.

Market value history

Market value ≠ transfer fee ≠ acquisition cost.

Highest recorded: €18.0M

Profile vs positional peers

Percentiles among 284 evaluated GK players with 900+ minutes.

Performance (last season, league)

Minutes
2340 (100% of available)
Goals + assists / 90
0.00
Context-adjusted G+A / 90
0.00
xG, xA, progression
Data unavailable
Defensive actions
Data unavailable
Performance percentile
79 (High)

Adjusted = shrunk toward positional baseline for small samples, corrected for team dominance over opponents, expressed relative to positional peers in the same league.

Context

League strength
0.42 (rank 16)
Team strength (Elo)
1550
Opponent strength
1214
Possession, role
Data unavailable

League strength 1.00 = average club of the big-five leagues. Elo includes continental matches.

Potential

Development
Moderate
Trajectory
stable
Breakout probability
Age > 23
Resale range (24m)
€8.8M – €31.8M

Trajectory drivers: league level up (+40 Elo).

Historical comparables (8): median 2-year value change +0% (IQR -51% to +6%).

Risk profile

Overall: Moderate

  • ⚠League level coefficient 0.43 (1.00 = big-five average): output may not translate.
  • ⚠Contract ends in 12 months: cheaper, but competition and wage demands likely.
  • ⚠Projection range wider than for most evaluated players.
  • ⓘInjury history unavailable from current data source.

League translation

What happened to players who moved from this league to the big-five leagues (observed, not a forecast).

Historical movers
58 (all positions)
Relative output kept
63%–179%
Held a regular role (900+ min)
60%
Confidence
Medium

Output is relative to positional peers in each league. Movers are a selected group (clubs buy players who fit), so treat this as context, not a guarantee.

Season-by-season (domestic league)

Context-adjusted values are model outputs.

SeasonClubLeaguePosAppsMinMin shareGAG+A/90Adj. G+A/90Opp. EloTeam EloLeague str.
2025/26Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK262340100%000.000.00121415500.43
2024/25Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK262340100%000.000.00125115250.35
2023/24Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK21808%000.000.00112714900.42
2022/23Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK327012%000.000.00125514460.37
2021/22Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK1904%000.000.00123614990.39
2020/21Olympiakos Syndesmos Filathlon PeiraiosSuper League 1GK327012%000.000.00119215310.39

Cups & continental competitions

SeasonCompetitionClubAppsMinGAAvg opp. Elo
2025/26Uefa Champions LeagueOlympiakos Syndesmos Filathlon Peiraios9810001654
2025/26Kypello ElladasOlympiakos Syndesmos Filathlon Peiraios19000—
2024/25Uefa Europa LeagueOlympiakos Syndesmos Filathlon Peiraios10899001511
2022/23Kypello ElladasOlympiakos Syndesmos Filathlon Peiraios545000—
2022/23Uefa Europa LeagueOlympiakos Syndesmos Filathlon Peiraios2180001449
2021/22Uefa Champions League QualifyingOlympiakos Syndesmos Filathlon Peiraios4390001405
2021/22Kypello ElladasOlympiakos Syndesmos Filathlon Peiraios112000—
2020/21Kypello ElladasOlympiakos Syndesmos Filathlon Peiraios19000—
2019/20Kypello ElladasOlympiakos Syndesmos Filathlon Peiraios218000—

Small continental samples are shown for context only and are not over-weighted.

Historical comparables

Most similar profiles 2+ years ago (same position group) and what happened next. Chosen by similarity only — failures included.

Player (then)AgeValue then~2y laterOutcome
Kamil Grabara
Superliga · 2024
25€12.0M€12.0Mflat
Uğurcan Çakır
Super Lig · 2022
26€18.0M€8.0Mfell
Mathew Ryan
Jupiler Pro League · 2015
23€7.0M€3.5Mfell
Dominik Kotarski
Super League 1 · 2024
24€5.0M€5.0Mflat
André Onana
Eredivisie · 2018
22€15.0M€36.0Mrose
Odysseas Vlachodimos
Liga Portugal · 2020
26€12.0M€15.0Mrose
Aleksandr Maksimenko
Premier Liga · 2021
23€13.0M€1.8Mfell
Anatoliy Trubin
Liga Portugal · 2024
23€25.0M€25.0Mflat

Transfer history

Fees as reported by the source; undisclosed fees shown as unknown, never estimated.

DateFromToFeeMV at time
1 Jul 2019Olympiacos U19OlympiacosUnknownData unavailable
9 Jul 2018Platanias U19Olympiacos U19€40kData unavailable

MoneyballAI identifies statistical opportunities from available data. A player flagged as a potential bargain is not guaranteed to succeed, to transfer, to rise in value, or to generate resale profit. Market values, fees and contracts come from third-party sources; ranges are model estimates with stated confidence.