With his contract remaining unsigned, despote terms being agreed over two months ago, Messi continues to be linked with a move to Manchester City.
The Argentine now has less than a year to run on his current contract, but Braida insists Barca are calm.
He told Tuttosport: “Messi is a real champion, one of the best.
“He’s a unique player, a huge player who has Barcelona in his heart. That’s why I think he will not budge.”