If Sarri is unhappy with Pjanic and the midfielders at his disposal, then why not try to persuade Jorginho. Chelsea are shrewd negotiators and were taken to the cleaners when they first signed the metronome. They will listen to offers.
Jorginho is the player who can make Sarri’s tactics work. He proved it with Napoli and then in Premier League pastures. It would make more sense to spend £72 million on a proven commodity.