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Blue cards in football?! Why revolutionary new colour is set to be trialed in first major change since 1970 World Cup
UEFA president Aleksander Ceferin has already spoken out against the idea, saying: "It’s not football anymore ... yellow and red cards were brought in at the 1970 World Cup, The Telegraph ...
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World Cup of Firsts
Mexico 1970 ... yellow cards made for a much more streamlined experience when it came to keeping order and devising tactics. Some developments were more subtle. Prying the World Cup away from ...