RIO DE JANEIRO—Soccer fans tormented by poor officiating in games caught a glimmer of hope Friday when the head of the sport's governing body proposed a few rough guidelines for use of instant-replay technology in the future.

FIFA President Sepp Blatter said coaches should have the right to challenge referees' decisions using video evidence during matches, as long as it doesn't stop play. He ruled out any changing of controversial offside decisions but said penalty calls and other situations could be up for discussion.

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