The midfielder is expected to be on the move this summer.
"Sebastian has class and is a serious boy," Andrea D'Amico told Calciomercato.com.
"I think he's ready for a big club at the level of Inter. He has the right profile to inherit the role of [Wesley] Sneijder, for example.
"The Dutchman is a champion, but if I were [President Massimo] Moratti, I would take into account any relevant offers for him."