The 20-year-old has been repeatedly linked with a move to the Camp Nou and has claimed that Messi is the best player in the world.
Neymar told Marca: "To play alongside Messi would be a dream. Even just training with him would make me very happy.
"For me, there are three players who are better than the rest - Iniesta, Ronaldo and Messi.
"But, the best is Messi. There is nobody who can do the things he does."
Barcelona's sporting director recently cast doubt over a possible move for Neymar.