The 21-year-old Neymar completed his $75 million move to Camp Nou from Santos at the start of June, though doubters had questioned whether the club had made a mistake in paying such a large sum for a player untested in Europe.
But after he scored four times in the Confederations Cup, including a stunning goal in the 3-0 final win over Spain, the Brazil international has answered his critics with goals and Messi is hoping for more of the same with Barcelona.
"I'm sure he will be a good signing for what we want to achieve," Messi told reporters. “Hopefully Neymar can make a big contribution to Barcelona and can continue to demonstrate the sort of performances that he's showed for Brazil and Santos."
The Blaugrana romped to the Primera Division title last season but were badly beaten by Bayern Munich in the semifinals of the Champions League. They were defeated 7-0 on aggregate over two legs by the eventual winners, but the club made a massive adjustmenet in its quest to reach Europe's peak again after the arrival of Neymar alongside four-time Ballon d'Or winner Messi.