Tottenham and Liverpool are chasing the Spain international.
"I do not believe that any club will pay Soldado's buy-out clause," Djukic told reporters in Spain.
"What I think is that he will stay with us, although I cannot guarantee anything. In football and in life you have to be prepared for anything.
"We all want him to stay and we think that he will, but it is possible that someone could actually meet that buy-out clause even I do not think that will happen.
"For now, he is our player and we are counting on him.
"Since the start we have said that Soldado is not for sale and that the only way that he could leave is if someone meets the buy-out clause amount and the player accepts it."