According to Daily Mail, the Blues are set to complete the signing of former England international goalkeeper Marcus Bettinelli.
The 29 year old goalkeeper is due to complete his medical and sign for the club in the next 48 hours.
Premier League side Aston Villa were also interested in signing the free agent but he has reportedly accepted a two year deal to join Chelsea.
Bettinelli will be a replacement for Willy Caballero, who left the Blues at the end of last month after his contract expired.
Provided the deal does not hit any last minute hitches, Bettinelli will offer back-up to first choice Edouard Mendy and competition for No 2 Kepa Arrizabalaga.