The Blaugrana supremo says that the Argentine's talent is unmatchable and that the Catalan side will not see a footballer in the same class as their No.10 ever again
The 24-year-old broke into Barca's first team in 2004 and has gone on to become a key member of the team and the club's all-time leading goalscorer.
His talent has been acknowledged with three Ballon d'Or awards, along with other individual honours, and Rosell has no doubt that the Argentine is one of a kind.
"I think Barca will never have a player like Messi again," he told reporters.
"Messi's greatness is present on and off the field of play."
Messi took his tally to 61 goals in all competitions in 2011-12 with his strike in Tuesday's 4-0 victory against Getafe.