Fans reacted positively as a white card was shown for the first time ever in a football match on Saturday.
Red and yellow cards have been an integral part of the sport for decades - but supporters may be surprised to learn about the introduction of a white one as well, along with several new footballing initiatives including longer stoppage time and concussion substitutes.
A referee brandished it during a Sporting Lisbon vs Benfica cup clash in Lisbon at the weekend in a bizarre incident.
As equipas médicas de Benfica e Sporting receberam cartão branco após assistirem uma pessoa que se sentiu mal na bancada ud83dudc4f pic.