- Players of the serving team must not prevent their opponents, through individual or collective screening, from seeing the server and the flight path of the ball.
- Individual screen: a player waves arms, jumps or moves sideways during the service, or stands to hide the server and the ballβs flight path.
- Collective screen: the server is hidden behind a group of two or more teammates and the ball passes over them.
- Sanction: a service fault β point and service to the opponents.
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