On 13 June 2010, Cristiano Ronaldo was fielding questions from a crowd of journalists in Magaliesburg, South Africa. Portugal were getting ready to kick off the 2010 FIFA World Cup campaign vs. the Ivory Coast, and Ronaldo, their attacking talisman, had not scored for his country in 16 months. However, the world’s most expensive player was far from concerned: “Goals, as a football legend once told me, are like ketchup. Sometimes as much as you try, they don’t come out, and when they come, many...