Brazil midfielder Gilberto Silva is confident Kaka can return to the peak of his powers at the World Cup after a debut season at Real Madrid which has been dogged by injury.

After an injury-hit campaign, Brazil coach Dunga has nursed him back to fitness and although he came off with 12 minutes to go in the 2-1 win over North Korea, Gilberto is confident Kaka will be a force to be reckoned with as the World Cup progresses.

He said: "In every game he will improve. It is very good to see him because he is really hungry to do well for Brazil and for himself."