As Goal.com exclusively revealed, Juventus are keen on the Montenegro international and are preparing an improved bid of €25 million for the attacker, having seen their first bid rejected by the Viola.
However, Fiorentina owner Andrea Della Valle insists that Jovetic is not for sale and Montella sees no reason to doubt the veracity of that statement.
"I hope he stays," the former Italy international told the Corriere dello Sport. "Anyway, the president was clear in this regard."
Meanwhile, Montella has been buoyed by the arrival of midfielder Matias Fernandez from Sporting Lisbon for a reported €4m fee, but concedes that he is not yet sure where to deploy the Chile international.
"He has talent," the 38-year-old coach enthused. "But we have to figure out where to play him."
Montella, who was capped 20 times by Italy, took charge of Fiorentina earlier this summer after parting company with Catania.