Brazil playmaker Kaka insists he will be fully fit for this summer's World Cup despite recent concerns over form and fitness for his club Real Madrid.
Kaka missed Sunday's La Liga game at Malaga with a hamstring problem and revealed he will spend four days being assessed by former club Sao Paulo.
"I'm going to be evaluated, they will see my condition and that I won't have any problems," said the 28-year-old.
"I will be 100% by the World Cup," the former AC Milan star added.
After his assessment with the Sao Paolo medical staff, Kaka is expected to meet up with his Brazil team-mates at a training camp in Curitiba.
Kaka endured a difficult first season with Real, having joined from the Italian club for about £68m in June 2009.
He struggled to find his best form and was sidelined for six weeks in March and April because of injury.
"It was a very difficult season which I had, but we have examples of players who were not in good form before the World Cup and ended up doing well, so I'm not worried," he said.
Five-time champions Brazil begin their campaign against North Korea on 15 June and also face the Ivory Coast and Portugal in Group G.