The Brazil international has been linked with several clubs, including Manchester City and Portsmouth.
“Luisao will not be leaving in January,” he said.
“He is a key man in our squad and we are not prepared to damage the team.
“The coach (Quique Flores) is seeking continuity and we will not be discussing any deal with anybody.
“Our strategy for the future does not include the sale of our best players.”
The 26-year-old’s contract with Benfica expires in 2010.
