Porto presidant Pinto da Costa has ruled out selling striker Lisandro Lopez.
Lopez is reportedly being tracked by a number of Premier League clubs after a number of impressive displays in the Portuguese Liga this season.
But Da Costa has insisted that Porto would reject any offers for the Argentine, who has struck 24 goals this season.
"Lopez is unavailable for sale. He is a key player for us and the club has no plans to consider an offer," he said.
"We have not received a formal offer for the player."
Lopez added: "I am happy in Porto but I have decided not to speak about my future until the end of the season."