Kaka believes his fellow Brazilians can win the World Cup -- if they can get past Colombia in the quarterfinals.
The midfielder, who recently signed with new MLS team Orlando City after missing out on Brazil's World Cup squad, said in an interview on ESPN that the Selecao still have plenty to prove after sneaking past Chile on penalties in the round of 16.
"I think Brazil has played some good games but Brazil has not convinced yet with good football," Kaka said. "But Brazil has a lot of talent. Neymar is playing good.
"I think the game against Colombia will be a nice challenge for us Brazilians because Colombia is doing so great in the competition. If we win against Colombia I think Brazil can arrive in the final and win the World Cup too."
Should Brazil get past Colombia on Friday, Kaka sees the only other South American team remaining as the biggest potential threat to ruining the host country's party.
"Maybe Argentina because one final between Brazil and Argentina in Brazil would be amazing as a final, but I can't imagine Argentina beating Brazil in the final," Kaka said.
Orlando City, who will begin play in MLS in 2015, unveiled Kaka as the club's first designated player on Monday. Kaka said playing in the United States fulfills a career goal.
"I said sometimes, a few times, that one day I'd like to play in the American league, in MLS," he told ESPN. "And I think this time has arrived with Orlando because I'm a friend of Flavio [Augusto da Silva], the owner.
"I think Orlando has an amazing project and I've been convinced for this project. I think we can do a lot of good things together. I think this team has good potential to [show] America how fun is soccer. For a lot of reasons I've been convinced to play for Orlando next season."
Before joining Orlando City, Kaka will play on loan with Sao Paulo, the club with whom he began his youth and professional career before being sold to AC Milan in 2003.