From 2007-08 the left-wing diagonal has been mandatory in English professional football although some referees at lower levels still use the opposite approach.

The referees at once used their wands to mark the two with colored fluffs.

The Racing Club players already started celebrating, so the referee used that excuse not to reverse the decision.

Before that game, all referees simply used their voices to control the flow of play.

The term whistle-blower comes from the whistle a referee uses to indicate an illegal or foul play.

He said the referee, Frank Cappuccino, could use his discretion in stopping the fight.

According to NFL rules, a team's first call is the one the referee will use.

The referee uses signals to communicate his/her decisions with the players, team officials and spectators.

The referees also use whistle blows to indicate infractions or to restart the play.

He said referees should use such videotape to settle such disputes.