Sarri had coached Napoli for three seasons and helped them finish runners up in the Serie A title race in the last two, before moving to Chelsea. The Italian lasted only a season there before Juventus came calling, having helped Chelsea win the Europa League.
For Insigne, that move to the Old Lady constituted a betrayal of both the fans and the club and said that they would try and beat Sarri’s team at all costs.
"I said it and I say it again, for us Neapolitans, that was a betrayal," Insigne said during a Q&A session, according to Goal. “And it will be forever. Now we have to focus on ourselves and try to beat him at all costs. Now that he's gone to Juve, I don't want to talk about him anymore. The
Scudetto is a dream for all of us and we will try once more."
With the player himself being linked with a number of top clubs, like Paris Saint-Germain and Liverpool, Insigne insisted he had no intention of leaving and wanted to end his career remaining with Napoli.
He said, "No, I never thought of leaving Napoli. I'm still young, I'm happy in Naples and want to stay here for the rest of my career.”