Chelsea boss Frank Lampard is determined to improve his defensive options this summer after the club conceded 79 goals in all competitions last season.
According to reports, Chelsea are closing in on signing two centre-backs this week.
Chelsea are poised to sign defender Malang Sarr on a four-year deal, according to reports in France.
French media outlet Telefoot claim the 21-year-old centre-back, who made 20 appearances for Nice last season, will undergo a medical in London this week.
Sarr is a free agent after turning down a new contract with the Ligue 1 club.
Former Paris Saint-Germain captain Thiago Silva is also expected to join Chelsea this week after reportedly agreeing a one year deal with the Blues with an option to extend for another year.
Silva is currently a free agent after his PSG contract expired following Sunday’s Champions League final defeat to Bayern Munich.