João Mendes

31 yrs · Attacking midfielder (also LW) · Portugal
Kayserispor · Super Lig · Foot: right · Height: 183 cm
Risk: HighConfidence: MediumSample: MediumDevelopment: LowContract: until 30 Jun 2027
Market value
€1.0M
Updated 6 days ago
Estimated acquisition
€221k – €704k
Estimated · 20–80% range
Model value
€359k – €910k
Performance-implied · estimated
Projected (24m)
€310k – €735k
Resale range · estimated
Potential value gap
-€345k – €689k
Model value − acquisition

Value picture

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

Estimated acquisition€221k – €704k
Model value (performance-implied)€359k – €910k
Projected value (24 months)€310k – €735k
Dashed line: current market value (€1.0M). Bars are 20–80% model ranges; tick = median.

The model rates João Mendes's performance-implied value at EUR 0.4M-0.9M, above the estimated acquisition range of EUR 0.2M-0.7M. Its 24-month market value projection is EUR 0.3M-0.7M. Context-adjusted goal contributions are 0.81x the positional average in the league (1505 minutes, league coefficient 0.40). 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: 42

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

PerformanceBelow average27.7th pct among MID peers (age-neutral)
AgeUnfavorable31.7 years
Acquisition costVery favorableest. €294k vs market €1.0M
Expected appreciationVery low-54% over ~2 years (model)
Value gapLargeweak predictor on its own
DevelopmentLow
League translationUncertainleague coefficient 0.4
Tactical fitNot evaluatedRequires event/role data not available from the current free source.
RiskHigh
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: €2.0M

Profile vs positional peers

Percentiles among 1163 evaluated MID players with 900+ minutes.

Performance (last season, league)

Minutes
1505 (49% of available)
Goals + assists / 90
0.24
Context-adjusted G+A / 90
0.32
xG, xA, progression
Data unavailable
Defensive actions
Data unavailable
Performance percentile
28 (Below average)

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
0.40 (rank 18)
Team strength (Elo)
1147
Opponent strength
1259
Possession, role
Data unavailable

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

Potential

Development
Low
Trajectory
stable
Breakout probability
Age > 23
Resale range (24m)
€310k – €735k

Trajectory drivers: changed club; team strength down (-265 Elo); league level down (-54 Elo).

Historical comparables (8): median 2-year value change -55% (IQR -68% to -13%).

Risk profile

Overall: High

  • ⚠Limited sample: 1505 league minutes last season.
  • ⚠League level coefficient 0.40 (1.00 = big-five average): output may not translate.
  • ⚠No continental-competition minutes last season.
  • ⚠Contract ends in 12 months: cheaper, but competition and wage demands likely.
  • ⚠Age 32: resale value typically declines.
  • ⓘ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
35 (MID)
Relative output kept
77%–144%
Held a regular role (900+ min)
69%
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.
2025/26KayserisporSuper LigAM26150549%040.240.32125911470.40
2024/25Vitória Guimarães SCLiga PortugalAM32153250%430.410.34134714120.51
2023/24Vitória Guimarães SCLiga PortugalLW26145347%730.620.56136813970.58
2022/23GD ChavesLiga PortugalAM31235877%210.110.25141213370.68
2020/21CD TondelaLiga PortugalAM61886%000.000.39132212420.61
2018/19CD TondelaLiga PortugalAM31445%010.630.51137312990.65

Cups & continental competitions

SeasonCompetitionClubAppsMinGAAvg opp. Elo
2024/25Uefa Conference League QualifyingVitória Guimarães SC379101382
2023/24Uefa Conference League QualifyingVitória Guimarães SC2130001235

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
Onur Ergün
Super Lig · 2023
31€850k€325kfell
Gabriel Obertan
Super Lig · 2021
32€400k€150kfell
Jens Cools
Jupiler Pro League · 2022
32€500k€100kfell
Flavien Tait
Super Lig · 2024
31€2.0M€300kfell
Campanharo
Super Lig · 2022
30€1.2M€1.2Mflat
Sammy Clingan
Scottish Premiership · 2015
31€450k€450kflat
César Pinares
Super Lig · 2022
31€1.5M€800kfell
Erik Sabo
Super Lig · 2022
31€725k€600kflat

Transfer history

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

DateFromToFeeMV at time
8 Aug 2025Vit. GuimarãesKayserisporFree / loan€2.0M
1 Jul 2023ChavesVit. GuimarãesFree / loan€800k
5 Jul 2021TondelaChavesFree / loan€150k
30 Jun 2021EstorilTondelaFree / loan€150k
30 Jan 2021TondelaEstorilFree / loan€200k
30 Jun 2020CoimbraTondelaFree / loan€225k
31 Aug 2019TondelaCoimbraFree / loan€200k
1 Jul 2019OliveirenseTondelaUnknown€200k
30 Jun 2019TondelaOliveirenseFree / loan€200k
2 Jul 2018OliveirenseTondelaFree / loan€325k
1 Jul 2016OperárioOliveirenseFree / loanData unavailable
1 Jan 2016NogueirenseOperárioFree / loanData unavailable
1 Jul 2015GouveiaNogueirenseFree / loanData unavailable
1 Jul 2014GondomarGouveiaFree / loanData unavailable
1 Jul 2013Gondomar U19GondomarUnknownData unavailable
1 Jan 2013Leixões U19Gondomar U19Free / loanData unavailable
1 Jul 2011Leixões U17Leixões U19UnknownData unavailable
1 Jul 2009Leixões U15Leixões U17UnknownData unavailable
1 Jul 2007Leixões YthLeixões U15UnknownData 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.