Chelsea signed left-back Ben Chilwell from Leicester City for a reported €55m, meaning Emerson Palmieri is expected to join Inter.
The deal for Chilwell was confirmed today, with the England international putting pen to paper on a five-year contract.
It frees up current left-back Emerson for a return to Serie A, where he played for Roma from 2015 to January 2018.
He made the €20m move to Chelsea under Antonio Conte, but only managed seven games with that coach.
They aim to reunite at San Siro, with Conte long naming the Brazilian-Italian as a transfer target for Inter.
This news comes just as left-back Cristiano Biraghi is sent back to Fiorentina rather than extending his loan.
Chelsea want €15-20m to release 26-year-old Emerson to the Nerazzurri.