Chelsea have agreed a £23million fee with Fiorentina to sign Marcos Alonso.
Personal terms are also understood to have been agreed and the left-back is only a medical away from conforming the move.
Talks had been ongoing for days after Antonio Conte made the 25-year-old a top target. It comes after the Italian allowed Baba Rahman to join Schalke on loan while Kenedy, another player who Chelsea have used at left-back, joined Watford.
Alonso, who played for Bolton between 2010 and 2013, was keen to return to English football and an official announcement is expected this afternoon.