Newcastle boss Rafa Benitez insists Daryl Janmaat will only leave for a "fantastic offer".
There has been speculation that Watford and West Ham are interested in Janmaat, who was not in Newcastle's squad at the weekend.
"I told him the other day that the fact he's here means he's a player I like," Benitez said. "He's a good professional and I don't have any problems with that.
"If somebody comes with a fantastic offer to us for him, we will analyse that. For the moment he is a player who is in our team and squad and I don't have any problems to play him if necessary."