Reports in the Turkish media have emerged claiming Isaksson, who has struggled to overcome a succession of injuries since his arrival from Rennes for £2million 15 months ago, will leave Eastlands for £1.3million when the transfer window opens in January.
"The sales usually start after Christmas, not before," Eriksson said.
"Andreas is worth much more than £1.3million. I understand Andreas wants first-team football. He is looking at Euro 2008 next summer and of course, he is afraid to miss it.
"He has been a regular for Sweden for years now and has done very well.
"My problem is that I have three very good goalkeepers, who all want to play, although I can say that at 3pm tomorrow, Andreas will be very happy."