★ TECHNIQUE

Serving guide

Underhand, float, jump float and jump topspin

Beginner~15 min

★ GUIDE CONTENT ★

★ GOLDEN RULE

80% of serving errors come from the toss. Stabilize the toss first, before chasing power.

SERVE TYPES

BEGINNER

Underhand serve

underhand — pendulum below the waist

Pendulum motion of the hitting arm below the waist. Legal at every level, recommended for beginners or in case of a shoulder injury. Almost nonexistent above adult regional level.

KEY BIOMECHANICS

▸Short kinetic chain: hips → shoulder → arm → hand
▸Pendulum motion without torso rotation
▸Weight transfer: back foot → front foot
▸Contact: heel of the hand or closed fist beneath the center of the ball

EXECUTION STEPS (RIGHT-HANDED)

1Left foot forward, weight on the back leg
2Left hand holds the ball at hip height, aligned with the arm
3Right arm cocked back, palm open or fist closed
4Release the ball just before contact — don't toss it
5Swing forward, strike below the center of the ball
6Arm follows through and points at the target, weight transferred to the front foot

✗ COMMON ERRORS

✗Ball held too low or off to the side
Keep the ball at hip height, aligned with the hitting arm
✗Striking with the fingers
Use the heel of the hand — broader, more stable surface
✗Tossing too high
Just release the ball, don't toss it up
✗Soft wrist
Lock the arm at contact for a clean impact

★ DRILLS

▸Hoops bowling: aim at zones 4 m from the net
▸10 serves from 4 m, then back up 1 m per set until the end line
▸4×3 m floor targets — aim for 50% accuracy

VIDEOS — UNDERHAND SERVE

▶Underhand + tennis serve (Sikana)YT ▶How to serve underhandYT

TARGET ZONES & TACTICS

OPPONENT ZONE	TACTICAL EFFECT
Zone 1 — back right	Blocks the setter release in a 5-1 system
Zone 2 — short front right	Disrupts the right-side start, excludes the libero
Zone 3 — short front middle	Blocks the middle, breaks up quick attacks
Zone 4 — short front left	Forces the main hitter to pass AND attack
Zone 5 — deep back left	Long diagonal, high error rate
Zone 6 — deep back middle	Serve deep against short setters

▸Seams : Aiming at the space between two passers is more effective than aiming at a player — it stresses the opponent's communication.

▸Alternate short/long : Prevents the setter from knowing when to back off. The short float (zones 2-3-4) behind the attack line is particularly disruptive.

▸FBSO% metric : A serve that drops the opponent's First Ball Side Out from 70% to 45% without producing an ace is a very effective serve.

★ LEARNING HIERARCHY

Underhand serve

Beginner

Standing float serve

Intermediate

Jump float serve

Advanced

Jump topspin serve

Competition

Master each level before moving on to the next. Consistency beats power.