Sunderland chairman Niall Quinn has described reports that Asamoah Gyan's availability has been circulated to other clubs as 'embarrassing'.
The 25-year old striker's name was reportedly on a list of players sent out by a north east agency.
"The suggestion is embarrassing," Quinn told the club website.
"I hope our fans would be smart enough to realise that this is probably some way of attempting to destabilise our relationship with one of our players."
Quinn added: I'm sorry that our fans have to read the endless speculation that appears in the press at this time of year.
"Normally we don't comment on any of it as there's so much. For instance, we've been linked to over 40 players in the last month or so alone."
Gyan, who joined Sunderland in August 2010 at a fee in excess of £13m from French side Rennes, scored 11 goals in his debut season on Wearside.
The Black Cats have already sold England international midfielder Jordan Henderson to Liverpool for £20m earlier this month.
Meanwhile boss Steve Bruce is looking to strengthen the squad, notably in striking areas following the £24m departure of Darren Bent to Aston Villa in January, and the return of loan striker Danny Welbeck to parent club Manchester United.
"What I can say is that we are in a number of meaningful negotiations to bring players in and when there's anything definitive to report it will be on our club website for our fans to read," Quinn added.