Brazilian singer Claudia Leitte, US singer Jennifer Lopez, and US rapper Pitbull perform during the opening ceremony prior to the FIFA World Cup 2014 group A preliminary round match between Brazil and Croatia at the Arena Corinthians in Sao Paulo this evening. Photograph: Tolga Bosoglu/EPA

Brazilian police and protesters clashed today before the opening game of the World Cup and five people were injured although the country finally burst(...)