Volleyball drill: defend 2 teams (loose call)

Two rows behind the back line

1. First of each row steps into the field
2. Trainer throws/serves ball into the field
3. The player who plays the ball calls loose and passes the ball to the other player.
4. The other player gives a set-up in return.
5. Number one attacks
6. Retrieve ball and put it in the box
7. Join the other line