The former Selecao star was critical of the 23-year-old forward, despite him boasting an impressive strike rate at the national team.
Former Brazil international Leonardo says he doubts Neymar has the maturity required to be the leader of the national team.
The 23-year-old was appointed captain of Dunga's side in the aftermath of World Cup 2014, but was criticized for allowing his emotions to get the better of him at this summer's Copa America.
Neymar was sent off following the group stage defeat to Colombia after headbutting Jeison Murillo and was consequently handed a four-match ban, which ruled him out of the rest of the tournament.