Referee Carlos Velasco of Spain marks a line with a spray during their semi final soccer match between Raja Casablanca and Atletico Mineiro at the Club World Cup soccer tournament in Marrakech, Morocco, Wednesday, Dec. 18, 2013. FIFA referees use vanishing spray to mark out the distance for a defensive wall from a free kick. The spray is popular in South America but is not widely used elsewhere. Vanishing spray is unlikely to be used at the World Cup in Brazil. (AP Photo/Matthias Schrader)
Making a World Cup ball that isn’t awful is harder than you think
By Simon Choppin
First Published Mar 08 2014 11:15 am • Last Updated Mar 08 2014 11:15 am
Since 1970, every World Cup football has been made by Adidas and the two most recent balls used, in 2010 and 2006, drew criticism for behaving like a beach ball while in flight. A lot of science and a new design may have fixed the problem, or created others.
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