The server shall stand with one foot on the back line. The ball must be batted with the hand. Two services or trials are allowed him to place the ball in the opponent's court (as in tennis). The server may serve into the opponents' court at any place. In a service, the ball must be batted at least ten feet, no dribbling allowed. A service which would strike the net, but which is struck by another of the same side before striking the net, if it goes over into the opponent's court, is good, but if it should go outside, the server has no second trial.