Chelsea have agreed a deal with Inter Milan to sign Cesare Casadei, according to Sky in Italy.
The agreement is £12.6m (€15m) plus £4.2m (€5m) in add-ons.
The very last details between the two clubs are being filed.
The midfielder is expected to leave for England on Wednesday and then undergo a medical on Thursday.
Casadei is 19 years old and has not made a senior appearance for Inter.
New Chelsea owners Todd Boehly and Clearlake Capital have spent their first summer in charge at Stamford Bridge conducting a swift overhaul in every department.
The ambitious US bosses have spent a league-topping £176.5m on new signings this summer, primarily on three first-team signings: Marc Cucurella (£63m), Raheem Sterling (£47.5m) and Kalidou Koulibaly (£34m).
Highly-promising young goalkeeper Gabriel Slonina has been signed and will remain on loan at Chicago Fire. Chelsea are also understood to be in negotiations with Barcelona over a deal for striker Pierre-Emerick Aubameyang, while the quest to prise Wesley Fofana away from Leicester continues.