Bilic told The Sun: "I have spoken with Luka and I will respect whatever he decides to do.
"But I did say to him he's already at a massive club at Tottenham.
"Everyone knows huge clubs are interested in Luka but what I said was he should not forget how big Tottenham are.
"Glenn Hoddle and Chris Waddle spent many years here and are proud to have played for this club.
"If he decides to leave then Luka should do it for the right reasons."