Croatian ace Modric, 26, wanted to leave last year but chairman Daniel Levy held firm.
Mullery said: “The situation is the same as last season but Luka is under contract.
“I don’t see why Levy would be anything but as resolute as he was then.
“The chairman has been there before and I’m sure he’ll be there again.
“Gareth is still a young man learning his trade and has lots of years to play in the Premier League, with Tottenham or somewhere else.
“But I don’t think he will leave.”