Hearts boss Jim Jefferies has been showing interest in the 26-year old centre-half, who is out of contract at Pittodrie Stadium, but is unsure if he is the right man to come to Tynecastle.
"Zander is one that way back came on to the scene at Aberdeen and did fantastically well," said Jefferies.
"He has lost his way over the past couple of seasons. Maybe he has been at Aberdeen too long. Can we get that player we feel is in there out of him?
"He has hardly played with a regular, experienced centre-back. I have said to him face to face that he has a lot of faults but he has a lot of pluses as well.
"I have done the homework, I have spoken to a lot of people who have worked with him. They say he is a terrific lad to work with and great in the dressing room. He is a great competitor."