The Sweden star failed to make the final three in the voting for the Ballon d'Or but has continued to find the back of the net with regularity, scoring 18 goals in 25 games for club and country this season.
In a wide ranging interview with Telefoot, his representative spoke about the 33-year-old's future while claiming there will never be another player quite like the controversial striker.
He said: "A new Zlatan? He will never exist. He is stronger than Ronaldo and Messi. He's under contract until 2016 and I don't like to make predictions about his future. He has a contract and the contract is respected."
Paul Pogba is another of Raiola's star clients, with the Juventus midfielder consistently linked with a summer move to another big European club - and the agent admitted the France midfielder could well move on sooner rather than later.
"Pogba could go to one of six teams," he continued. "When the right moment arrives this summer we will take it but moving isn't an objective in itself. We're in no hurry.
"If he goes he will break Ronaldo's transfer record."
The France star has a contract with the Bianconeri until 2019 and has been linked with Real Madrid and former club Manchester United, who he left to move to Turin in 2012.
