Juventus have struck a £72.5 million agreement with Barcelona to sign Brazil international Arthur Melo, according to Sky Sports.
The Catalans accepted a bid worth £72.5 million ($91m) for the midfielder, while talks continue over Juve star Miralem Pjanic, who is wanted at Camp Nou.
According to Sky Sports News, Sarri wants to build his midfield around him in a similar way to that of Jorginho at Napoli and Chelsea.
They have also offered the 23-year-old more wages than his current deal at Barca.
According to Sky Italy, Juve value the 30-year-old at £63.4m (€70m) but Sky Sports News has been told Barcelona do not feel he is worth just £9m (€10m) less than Arthur.
The two clubs are also said to want to conclude the transfer before June 30 – but Juve sporting director Fabio Paratici has denied this.