Best U23 Young Left-Backs in the Liga Portugal
13 players aged 23 or under · ranked by Analytical Strength Index
Best Young Left-Backs in the Liga Portugal (Oct 2026)
13 players tracked across 9 clubs. Updated October 2026.
Ranked by Analytical Strength Index
Use the search bar below to find specific players, or apply filters to narrow results by club, age range, or market value. Click the chart icon next to any player to view their historical value trajectory and forecast.
Player Rankings
Ranked by Analytical Strength Index. Click any player to view full profile, or click the chart icon to see value history.
Samuel Dahl
SL Benfica • 23 years old
€11.2M
€13.0M
+15.6%
Expected: €12.6M
68.6
Chissumba
FC Alverca • 21 years old
€4.3M
€5.0M
+15.6%
Expected: €5.1M
52.3
José Neto
SL Benfica • 18 years old
€2.6M
€3.0M
+15.6%
Expected: €3.5M
41.3
Pedro Bondo
FC Famalicão • 21 years old
€1.7M
€2.0M
+15.6%
Expected: €2.0M
37.0
Guilherme Montóia
CF Estrela Amadora • 23 years old
€649K
€750K
+15.6%
Expected: €728K
25.2
Isaac James
FC Alverca • 22 years old
€519K
€600K
+15.6%
22.1
Arnau Solà
FC Arouca • 23 years old
€432K
€500K
+15.6%
20.1
Tiago Parente
GD Estoril Praia • 22 years old
€432K
€500K
+15.6%
19.8
Tiago Parente
SL Benfica • 20 years old
€432K
€500K
+15.6%
19.2
Hélder Sá
Rio Ave FC • 23 years old
€259K
€300K
+15.6%
13.6
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Sign up freeSamuel Dahl
SL Benfica · 23 years old
68.6
ASI
Current Value
€13.0M
% Change
+15.6%
1yr Forecast Range
€11.4M - €13.9M
Chissumba
FC Alverca · 21 years old
52.3
ASI
Current Value
€5.0M
% Change
+15.6%
1yr Forecast Range
€4.5M - €5.7M
José Neto
SL Benfica · 18 years old
41.3
ASI
Current Value
€3.0M
% Change
+15.6%
1yr Forecast Range
€3.1M - €3.9M
Pedro Bondo
FC Famalicão · 21 years old
37.0
ASI
Current Value
€2.0M
% Change
+15.6%
1yr Forecast Range
€1.8M - €2.3M
Guilherme Montóia
CF Estrela Amadora · 23 years old
25.2
ASI
Current Value
€750K
% Change
+15.6%
1yr Forecast Range
€655K - €800K
Isaac James
FC Alverca · 22 years old
22.1
ASI
Current Value
€600K
% Change
+15.6%
1yr Forecast Range
Arnau Solà
FC Arouca · 23 years old
20.1
ASI
Current Value
€500K
% Change
+15.6%
1yr Forecast Range
Tiago Parente
GD Estoril Praia · 22 years old
19.8
ASI
Current Value
€500K
% Change
+15.6%
1yr Forecast Range
Tiago Parente
SL Benfica · 20 years old
19.2
ASI
Current Value
€500K
% Change
+15.6%
1yr Forecast Range
Hélder Sá
Rio Ave FC · 23 years old
13.6
ASI
Current Value
€300K
% Change
+15.6%
1yr Forecast Range
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Sign up freeMarket Overview: Liga Portugal Young Left-Backs (updated October 2026)
Our database tracks 13 Liga Portugal Young Left-Backs as of October 2026, representing 9 clubs with a combined market value of €26.9M. The average market value for Liga Portugal Young Left-Backs is €2.1M, with the average age at 22 years old.
The most valuable young left-back in the Liga Portugal is Samuel Dahl, worth €13.0M and playing for SL Benfica at 23 years old. The top 5 Young Left-Backs average €4.8M in market value, including Chissumba and José Neto.
Age distribution shows the youngest tracked young left-back is José Neto (18 years, SL Benfica, €3.0M), while the oldest is Samuel Dahl (23 years, SL Benfica, €13.0M). Research shows Young Left-Backs typically peak at age 28.
Our 1-year forecast model projects 7 Young Left-Backs (54%) will increase in market value over the next 12 months based on age-curve trajectories, current performance trends, and playing time analysis. The Liga Portugal market for Young Left-Backs remains actively developing with emerging talent as of October 2026.
Explore Market Size by Position in Liga Portugal
Interactive bubble chart showing predicted 2-year growth vs current age for all Liga Portugal Young Left-Backs. Identify undervalued assets and track market momentum across 9 clubs with €26.9M combined value.
Age Distribution: Liga Portugal Young Left-Backs
The Liga Portugal LB market shows 2 distinct age segments, with the largest cohort in the 21-23 bracket (11 players, 85% of market). The 21-23 age group holds the most value at €23.4M, averaging €2.1M per player.
Top Young Left-Backs by Age Bracket
U21 Years (2 players)
21-23 Years (11 players)
Market Value Distribution
Elite Tier Concentration
The top 2 Young Left-Backs (15% of players) control €18.0M
Market Tiers
Market structure shows distributed value with mid (€5-15m) tier representing 15% of the Liga Portugal LB pool.
Mid (€5-15M)
Emerging (<€5M)
Club Distribution: Liga Portugal Young Left-Backs
Among 9 Liga Portugal clubs, SL Benfica leads with 3 Young Left-Backs worth €16.5M (averaging €5.5M per player). The top 10 clubs account for 100% of tracked Young Left-Backs.
SL Benfica (3 Young Left-Backs)
FC Alverca (2 Young Left-Backs)
FC Famalicão (2 Young Left-Backs)
CF Estrela Amadora (1 Young Left-Backs)
Scout Tools
Advanced analytics for scouting and recruitment decisions. Each tool provides unique insights into player value, potential, and market dynamics.
Pre-Peak Value Efficiency (PPVE)
Identifies pre-peak players offering exceptional value relative to their age bracket. Higher PPVE = better value.
Understanding Pre-Peak Value Efficiency (PPVE)
SL Benfica's Samuel Dahl at 23 years old has the highest Pre-Peak Value Efficiency at 26.00×. That means Samuel Dahl is valued 26.00× higher than the median player in the 21-23 age bracket-representing exceptional value before reaching peak age.
In second is FC Alverca's Chissumba, who is 21 years old, with a 10.00× PPVE. Third is Pedro Bondo of FC Famalicão, who is 21 years old with a 4.00× PPVE.
How PPVE is calculated: PPVE compares a player's current market value to the median value of all players in their age bracket. A PPVE of 26.00× means the player is worth 2500% more than typical players their age-making them high-value targets before they reach peak value.
PPVE by Age Bracket
| Rank | Player | Age | Bracket | Current Value | Bracket Median | PPVE |
|---|---|---|---|---|---|---|
| #1 | Samuel Dahl SL Benfica | 23 | 21-23 | €13.0M | €500K | 26.00x |
| #2 | Chissumba FC Alverca | 21 | 21-23 | €5.0M | €500K | 10.00x |
| #3 | Pedro Bondo FC Famalicão | 21 | 21-23 | €2.0M | €500K | 4.00x |
| #4 | Guilherme Montóia CF Estrela Amadora | 23 | 21-23 | €750K | €500K | 1.50x |
| #5 | Isaac James FC Alverca | 22 | 21-23 | €600K | €500K | 1.20x |
| #6 | José Neto SL Benfica | 18 | U21 | €3.0M | €3.0M | 1.00x |
| #7 | Arnau Solà FC Arouca | 23 | 21-23 | €500K | €500K | 1.00x |
| #8 | Tiago Parente GD Estoril Praia | 22 | 21-23 | €500K | €500K | 1.00x |
| #9 | Augusto Dabó Boavista FC | 22 | 21-23 | €300K | €500K | 0.60x |
| #10 | Hélder Sá Rio Ave FC | 23 | 21-23 | €300K | €500K | 0.60x |
| #11 | Diogo Costa FC Famalicão | 23 | 21-23 | €250K | €500K | 0.50x |
| #12 | Francisco Dias Vitória Guimarães SC | 23 | 21-23 | €200K | €500K | 0.40x |
| #13 | Tiago Parente SL Benfica | 20 | U21 | €500K | €3.0M | 0.17x |
Return-to-Peak Potential (RPP)
Recovery potential from current value to forecasted peak. Shows how much upside remains for players approaching their prime.
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Upside potential weighted against forecast uncertainty. Higher RAU = better risk-reward profile.
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Upgrade to FanRoster Pressure Index (RPI)
Squad depth pressure based on Z-score distribution. Negative RPI = thin depth, positive = deep roster.
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Upgrade to FanAge-Share Concentration (ASC)
Identifies players capturing disproportionate value relative to age group representation. Positive ASC = value concentration.
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Upgrade to FanBuy-Now vs Wait-List Map
Categorizes players by age position and upside potential to guide timing of acquisition.
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Upgrade to FanPrice vs Peer Z-Score
IQR-based pricing analysis relative to position peers. Identifies over/undervalued players vs market.
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How We Rank Liga Portugal Young Left-Backs
Our Analytical Strength Index is calibrated specifically for young left-backs, using position-specific age curves and playing time benchmarks. The model draws from academic research on player valuation (Franck & Nüesch, 2012) and age-performance curves (Dendir, 2016).
Scoring Components for LB
Historical Achievement Index (35%)
Peak career market value for Liga Portugal young left-backs, reflecting proven track record and reputation. Uses log-scale to account for exponential value distribution at elite level.
Current Performance Proxy (30%)
Present market value for Liga Portugal young left-backs, capturing recent form, injuries, and current performance level. Weighted to reflect age-related depreciation patterns.
Playing Time Utilization (18%)
Defenders with 2,500+ minutes score highest, indicating regular starting role and sustained performance.
Age-Adjusted Performance Curve (12%)
Defenders peak at 28 with 5.0%/year decline rate. Pre-peak players score higher on development trajectory.
Competition Level Adjustment (3%)
Liga Portugal competition level factored into comparative strength assessment.
Performance Expectations Multiplier (2%)
Players at clubs with Champions League pedigree face higher performance standards and tactical complexity, contributing to development and market validation.
LB Performance Benchmarks
Peak Age: 28 years (balance of physicality and tactical intelligence)
Decline Rate: Widening steps, not a flat rate: about -5% at 29, -10% at 30, steeper from 31 (positioning offsets pace loss)
Optimal Minutes: 2,500 per season (regular starter with rotation management)
1-Year Market Value Forecast
Probabilistic model combining age-curve depreciation, value momentum, and playing time factors:
• Age Factor: Compounding and banded around a peak of 28: +25%/year through age 21, +15% at 22-23, +10% up to the year before peak, then -5%, -10% and steeper with each later band. Growth is damped above €30M.
• Value Trajectory: Near career peak (>95% of peak value): +3% momentum | Moderate decline: -5%
• Playing Time Factor: Regular starters (+2%), Squad rotation (-2%)
• Forecast Range: ±10% confidence interval
Research Foundation
• Dendir (2016): Age-performance curves for young left-backs
• Carmichael et al. (2011): Player depreciation in top leagues
• Franck & Nüesch (2012): Hedonic pricing models for talent valuation
• Szymanski, S. (2015). Money and Soccer: A Soccernomics Guide
Frequently Asked Questions
Common questions about Liga Portugal Young Left-Backs, updated October 2026
Who are the most valuable Young Left-Backs in the Liga Portugal right now?
The most valuable young left-back in the Liga Portugal today is Samuel Dahl, who is worth €13.0M and plays for SL Benfica. The second most valuable is Chissumba (€5.0M, FC Alverca), followed by José Neto (€3.0M, SL Benfica). Our database tracks 13 Liga Portugal Young Left-Backs with comprehensive market valuations updated in October 2026.
How are Liga Portugal Young Left-Backs ranked?
Liga Portugal Young Left-Backs are ranked by our proprietary Analytical Strength Index, which is specifically calibrated for Young Left-Backs. The score combines six factors: Historical Achievement Index (35%) measuring peak career value, Current Performance Proxy (30%) reflecting recent market signals, Playing Time Utilization (18%) tracking minutes played, Age-Adjusted Performance Curve (12%) using position-specific peak ages, League Quality Coefficient (3%) for Liga Portugal competition level, and Club Tier Multiplier (2%) accounting for club prestige. This methodology is grounded in academic research including work by Dendir (2016) on age-performance curves and Franck & Nüesch (2012) on hedonic pricing models.
What age do Young Left-Backs peak?
Defenders typically peak at age 28. In our valuation model, value then falls in widening steps rather than at a flat annual rate: around -5% at 29, -10% at 30, and -25% or more from 31. Research shows defenders balance physical attributes with tactical intelligence, allowing them to maintain high performance through their late 20s. The optimal playing time for peak performance is around 2,500 minutes per season.
How much does it cost to sign a top young left-back from the Liga Portugal?
Transfer fees for Liga Portugal Young Left-Backs vary significantly based on market value, contract length, and club bargaining position. For the top-ranked young left-back Samuel Dahl (market value: €13.0M), estimated transfer fees would range from €10.4M to €18.2M depending on contract situation. Players with longer contracts (3+ years) command premium fees (1.2-1.4× market value), while those in the final year may be available for 0.8-1.1× market value. Our fee estimates are derived from historical transfer patterns and contract-clock modifiers validated against actual Liga Portugal transactions.
What is the value forecast for Liga Portugal Young Left-Backs?
Our 1-year forecast model projects market value changes for Liga Portugal Young Left-Backs based on age-curve depreciation, historical trajectory, and playing time adjustments. The forecast combines three factors: age-based appreciation/depreciation (pre-peak players compound gains toward their position's peak age, up to +25% a year through age 21 and easing as they approach it, while post-peak players fall in widening steps), market trajectory momentum (comparing current to peak value), and playing time confidence (regular starters receive +2% boost). Forecast confidence intervals account for position-specific volatility-defenders have ±10% volatility. Young players (under 22) and older players (over 32) receive 1.15× uncertainty multipliers due to unpredictable development or decline patterns.
Where does the Liga Portugal young left-back data come from?
Our Liga Portugal young left-back data is sourced from Football Analytics AI's proprietary Transfer Intelligence Database, which aggregates market valuations, player statistics, contract information, and transfer histories from multiple industry sources. Market values are updated regularly based on player performance, injuries, contract negotiations, and transfer market activity. We enhance this data with our proprietary analytics including position-specific scoring algorithms, age-performance curves calibrated to academic research, and statistical forecast models. All data is validated against official Liga Portugal sources and updated monthly (last update October 2026) to ensure accuracy for recruitment and investment decisions.