French President Nicolas Sarkozy said that he wanted to work with Russia to give developing nations a larger say in how to regulate the global economy.
US President Barack Obama urged the world's leading economies to avoid scaling back government spending too quickly or risk derailing the global recovery.
World Cup organisers faced protests as the Netherlands condemned "absurd" arrests over a marketing stunt and thousands of South Africans protested the tournament bill.
Police have arrested 178 people in Europe and the United States suspected of cloning credit cards in an international scam worth over 20 million euros.
Defending champions Italy made an unconvincing start to the World Cup with a drab 1-1 draw against Paraguay after Holland overcame a resilient Denmark.