Armand Doorn, a man said to work for Ba's management team, says Man Utd are weighing up a January approach for the Senegal international.
Ba has a release clause included in his Newcastle contract, speculation regarding his future on Tyneside has been steadily mounting.
Ba, though, claims to have no working relationship with the representative."Really, I don't know how desperate this "armand doorn" can be to talk like he's my agent!!"
Ba posted on his official Twitter account."He's nothing for me. Stop lying and show respect."