The 29-year-old Frenchman has been repeatedly linked with a move to Ligue 1 champions Marseille, and Antonetti appears to be resigned to losing him.
"The soap opera continues," Antonetti said.
"I think he must be unsettled, like any man who has to take a decision that will change his life."
"There are promises that have been made and if you want to be credible, you have to respect what you say," he added.
"From a sporting and financial perspective, we could tell Rod: 'Stay here'. But psychologically, it wouldn't be right."