The summer arrival from PSG is already being linked with a January move away.
Paratici said: “For us he's very important, we're happy about him like he is about us. I have no doubts that he will stay, both at the end of this season and next.
“Even Nedved, when he arrived in Turin, had problems adapting to the team for months and he always reminds me.
“I'm confident Matthijs will give us great satisfaction. Rabiot needs time, it's not easy get back playing after a long time out."