Not everyone plays tennis for the same reason. So we do not train everyone the same way.
With Fit · Fun · Focus, we read what a player needs and design lessons around movement, enjoyment and progress.
359.tennis is a tennis school in Amstelveen where we develop players and people through tennis.
Not just technique. Not just competitions.
But character, attitude and growth.
The Development System is part of The 359 Method and explains how Fit · Fun · Focus™ are applied in training.
The 359 Development System is built on three pillars: Fit (physical development), Fun (enjoyment and motivation), and Focus (mental growth). The model is applied at all levels — from beginners to academy players — at 359.tennis at NTC Amstelveen, near Amsterdam.
The 359 Method — Fit · Fun · Focus™
The Three Pillars: Fit · Fun · Focus™
The practical system at the heart of The 359 Method
FIT
Body
Physical development, motor skills, coordination and energy. A strong and energetic body is the foundation for moving more freely, playing better and enjoying the game more.
FUN
Heart
Enjoyment, motivation, connection and teamwork. Sport only truly works when people feel safe, enjoy themselves and want to keep coming back.
FOCUS
Mind
Attention, concentration, decision-making, analysis and reflection. Mental skills that help you on court — and beyond.
Every lesson contains all three.
Every player has their own dominant motivation.
359 Progress System
How we guide growth
Development is not accidental. The 359 Progress System is the structured way we make growth visible, measure it and guide it — as part of The 359 Method.
Small recognition moments
During every lesson, we recognise effort, attitude and progress.
Periodic evaluations
Regular moments to reflect on development together.
Seasonal reflection
At the end of each season, we make growth visible.
Personal goals
Every player works towards their own goals. Not someone else's.
Our starting point
Growth matters more than results
Effort outweighs talent
Making mistakes is allowed — it's part of the process
Every child has their own pace
The 359 Development Pathway
Alongside the tennis colour stages (Red → Orange → Green → Yellow), players also follow a personal development pathway within The 359 Method.
Tenniskids
Ages 5–12
Tennis: START → Red → Orange → Green
359: Discovery & foundation
Juniors
Ages 12–18
Tennis: Green → Yellow → Competition
359: Identity & ownership
Adults
18+
Tennis: Competition & recreation
359: Conscious growth
At every stage, guidance adapts — both on court and in personal development.
What sets us apart
"Win or learn. Both are victories."
The 359 Method is not about perfection. It's about progress. That's why we are 359 — always room for improvement.
Origin
The 359 Method was developed through years of coaching experience at 359.tennis — our academy in Amstelveen.
What started as an internal coaching philosophy evolved into a complete methodology. Every lesson, every season and every coach at 359.tennis contributes to refining The 359 Method.
359 and Competition
At 359® we believe that competition is essential for development. Matches make players stronger — physically, mentally and emotionally.
That's why we actively encourage playing matches and competition.
Our focus is not on the score, but on the process. On goals that players can control themselves:
Results are never fully controllable.
Attitude and behaviour are.
Progress. Not Perfection.
Parent System
The role of parents
Development goes beyond the lesson. We ask parents to:
Together we build a culture of trust and growth.
Read more about parent guidance →Part of The 359 Method
The Development System forms the foundation of The 359 Method.
Together these components ensure that development is visible, guided and sustainable.
Overarching
The 359 Method
You are here
Development System
Fit · Fun · Focus™
Always room for improvement.
359 Tennis
Develop your game. Develop yourself.