Capstone - Complete Analytics System
14.1 Evaluating Attacking Players
Forward evaluation has been revolutionized by expected goals and expected assists metrics. But elite forwards contribute far more than just goals - their movement, pressing, and link-up play create value that traditional stats fail to capture. This chapter provides comprehensive frameworks for analyzing strikers and wingers.
Learning Objectives
- Master xG-based evaluation for finishers
- Analyze shot quality and volume trade-offs
- Understand different forward archetypes and their metrics
- Evaluate wingers across goals, assists, and progressive actions
- Incorporate pressing and off-ball movement into forward analysis
Forward Archetypes
Poacher
- High shot volume in box
- Elite positioning
- Clinical finishing
- Example: Haaland
Target Man
- Hold-up play
- Aerial dominance
- Creates for others
- Example: Giroud
Mobile Striker
- Channel runs
- Pressing from front
- Wide movement
- Example: Firmino
Complete Forward
- Goals and assists
- Creates own chances
- Links play
- Example: Kane
14.2 xG-Based Striker Evaluation
Expected goals is the cornerstone of modern striker evaluation. Key concepts:
xG Metrics for Strikers
| Metric | What It Measures | Elite (per 90) |
|---|---|---|
| xG | Expected goals from shots taken | 0.60+ |
| npxG | Non-penalty xG (fairer comparison) | 0.50+ |
| xG/Shot | Average shot quality | 0.12+ |
| Goals - xG | Finishing skill (over/underperformance) | +3 to +5 season |
| npG/npxG | Finishing ratio | 1.10+ (elite) |
Understanding Finishing Skill
Caution: Regression to Mean
Overperformance of xG tends to regress over time. A striker scoring +8 above xG one season will likely score closer to their xG the next season. Use multi-season data for reliable finishing skill assessment.
14.3 Shot Profile Analysis
Understanding WHERE and HOW a striker takes shots reveals their style and optimal role.
- 6-yard box: Poacher indicator
- Penalty area: Standard striker
- Outside box: Technical ability
- Wide areas: Movement/drift
- Right foot %: Preference
- Headers: Aerial threat
- First-time: Reaction speed
- Free kicks: Set piece ability
14.4 Winger Analytics
Wingers are evaluated across goal contribution, chance creation, and progressive actions. The balance between these varies by role - inverted wingers focus on goals, traditional wingers on assists.
Winger Types
| Type | Key Metrics | Example |
|---|---|---|
| Traditional Winger | Crosses, xA, final third touches, take-ons | Rashford, Diaby |
| Inverted Winger | xG, shots, progressive carries into box | Salah, Saka |
| Wide Playmaker | Key passes, xA, pass completion, through balls | Grealish, Foden |
14.5 Pressing from the Front
Modern attacking players are increasingly expected to press from the front. This off-ball contribution creates value that doesn't show up in traditional stats.
Forward Pressing Metrics
Volume Metrics
- Pressures: Total pressing actions
- Att 3rd Pressures: High press activity
- Pressure Regains: Turnovers won from pressing
Efficiency Metrics
- Successful Pressure %: Possession within 5 seconds
- Press Intensity: Pressures per opp possession
- xG from Pressing: Goals from high turnovers
14.6 Forward Radar Charts
Radar charts help visualize the different strengths of various forward types.
14.7 Practice Exercises
Exercise 14.1: Striker Finishing Analysis Dashboard
Task: Create a comprehensive xG dashboard for strikers. Include xG/90, npxG/90, xG/shot, and finishing ratio. Identify over/underperformers (goals minus xG) and visualize with a scatter plot showing expected vs actual goals.
Exercise 14.2: Winger Type Classification
Task: Use clustering to classify wingers into types (Inverted, Traditional Crosser, Wide Playmaker, Hybrid) based on xG, xA, crosses per 90, and progressive carries. Visualize the clusters and identify key differentiating metrics.
Exercise 14.3: Complete Forward Index
Task: Build a "Complete Forward Index" that balances goal scoring (40%), creation (30%), and pressing contribution (30%). Calculate weighted z-scores, rank forwards, and create radar charts for the top 5.
14.8 Chapter Summary
Key Takeaways
- xG is essential for striker evaluation - compare goals to xG for finishing skill
- Shot quality (xG/shot) indicates shot selection and positioning ability
- Finishing skill tends to regress - use multi-season data
- Wingers vary from goal-scorers (inverted) to creators (traditional)
- Pressing contribution from forwards creates value not captured in goals/assists
- Radar charts effectively compare different forward archetypes
Next Steps
In Chapter 15, we'll explore team-level analytics, examining how to evaluate overall team performance, playing styles, and tactical approaches using aggregate data.