A judge pronounced "re-serve" for interrupt play. 16.1 In case of unforeseen or unexpected circumstances, should be re-serve. 16.2 In addition to serving, the ball over the net and hung in the top line or stop in the net should be re-serve. 16.3 serve, the players and the players at the same time sending and receiving illegal, should be re-serve. 16.4 pick the players in the players when the ball is not ready to be re-serve. 16.5 in the match, the ball the ball the rest of the care with complete separation, should be re-serve. 16.6 linesman did not see the referee can not make decisions, should re-serve. 16.7 "heavy ball", the last ball is invalid, the primary players to re-serve (except as provided in Rule 14).