No mercy: Referee Artur Dias shows a yellow card to Manchester United’s Casemiro during the match against Sevilla. — AP
THE modern version of the game of football has been around since the 19th century, and for almost as long there have been referees. While we know referees use whistles and coloured cards to call out fouls now, in the past it is said they used handkerchiefs.
Is this true?
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