The 21-year-old has been in fine form at the Confederations Cup, netting three goals and setting up two more to lead Brazil to the final of the competition, and the Argentine is anticipating more to come from his new team-mate at club level.
"Neymar really is a great player and I have no doubt that he will contribute a lot," the Argentine was quoted as saying by Sport.
|8/1||Neymar is 8/1 with Bet365 to be the top goalscorer at the Confederations Cup
The prolific attacker then went on to discuss the appointment of Carlo Ancelotti as Real Madrid coach and thinks that the Santiago Bernabeu side will be back challenging for the Liga title again in 2013-14.
"Barcelona's goal will again be to fight for all trophies. We will have to compete against a great team, though. It will not be easy because Madrid have some great players," he went on.
"They already had a good coach before and have now found another great one."
Messi also had his say on Pep Guardiola's move to Bayern, warning that the former Barca boss will make the Champions League winners even stronger.
"Bayern were already a great team before Pep's arrival," he remarked. "They won it all last season and have some fine players. The arrival of Guardiola will only make them stronger."