Manchester United fans long for the return of Ronaldo, whom the English club sold to Madrid for a record 80 million pounds (then $131 million) in 2009.
Perez says in Tuesday's edition of French newspaper L'Equipe that "Real Madrid revolves around him," adding "I can assure you he will end his sports career here. We have not received any offers for him."
Despite scoring plenty of goals, Ronaldo has had off-field problems at Madrid and recently acknowledged he misses the Premier League.
There is a 1 billion euro ($1.5 billion) buy-out clause in Ronaldo's contract, which runs until 2015.