The 41-year-old has praised the 22-year-old's personality as his greatest quality and backed him to take the World Cup by storm.
The hopes of the national side will rest on the shoulders of the Barcelona star at this summer's World Cup, as Brazil looks to lift the trophy on home soil.
Carlos, 41, was part of the Selecao side which was crowned world champion back in 2002 after losing the 1998 final to France, and says he is confident the current national team can go all the way with Neymar in the ranks.
He told Bild: "(I think we will win) not only because of the advantage of playing at home, but because Luiz Felipe Scolari changed the way we play football in the Confederations Cup last summer.
"Neymar is a genius. He will be a key player at the World Cup. What is most striking about him is his character. Players with good judgement and confidence are needed."
The former Real Madrid defender is now in charge of Turkish Super Lig outfit Sivasspor but revealed he harbors lofty ambitions in his new life as a coach.
"The Bundesliga is incredibly sexy, or do you think Pep Guardiola went over there because Germany has the best beer?! Maybe I will be the first Brazilian to manage a Bundesliga club.
He added: "One day I want to manage Brazil."