each team in all league matches are recorded. A team winning a match in two straight games, after recording the points scored for and against in the two games played also receives 35 points in favour and zero points against for the third (unplayed) game. Correspondingly, zero points in favour and 35 points against are recorded for the losing team. The difference between total points in favour and against in all the matches is a team's point score. The team scoring the most net points (for minus against) is the winner. Discipline The umpire can warn a player if the player behaves on-court in a manner bringing discredit to the referee, other players or the officials, or otherwise lowering the image of the game. A second warning triggers a yellow card. A third warning triggers a red card and ejection from the game; following a red card, the player's team continues with four players. A team manager substitute for a player shown a yellow card, if a sufficient number of substitutions remain. Umpire duties Since the umpire is the most important official, he should be well-versed in the rules of ball badminton Before the play begins, he makes necessary entries on the score sheet and hands it to the scorer for use and obtaining signatures of each team captain when the match ends Check net height and other ground arrangements Instructs line referees and scorer Instructs both the terms on discipline, major rules and recent rule changes Carefully consider his decisions, since his judgments are final; a player may only appeal based on a rule A line referee's decision is final in all judgment calls on his own line; the umpire does not ordinarily overrule him. If a line referee's vision is blocked, the umpire may make the call if he can; otherwise a 'let' should be given If a decision is impossible, the umpire gives a 'let'. He should not consult the players or spectators The umpire is responsible for all lines not covered by line referees When the umpire is uncertain whether there has been an infringement of a rule, 'fault' should not be called. A 'let' should be given The umpire should remember the game is for players, and keeps play in progress without unnecessary interruption In summation, the umpire should control the game firmly See also Racquet sport References External links Ball Badminton Federation of India