The pair have long been at odds ever since Cassano was a player with the Nerazzurri.
He told Bobo TV: “I told Inter I would stay if they kicked out Marotta. And they sent him away, maybe he's poisoned for that. For that result at Sampdoria, Marotta must say thanks to me.
“I have been a phenomenon, he has never been a capable manager: the whole world of football knows this, he sells well with journalists.
"On a human level, Cassano does not have to learn from anyone, much less from you.