Chelsea poised to buy £33.8m Koulibaly from Napoli and confirm Sterling arrival

The Senegalese should be the first of at least two centre-backs to join

TEAMMATES: Chelsea's Reece James and Manchester City's Raheem Sterling. Photo credit: Nick Potts/PA Wire.

Chelsea are on the verge of boosting their defensive options after agreeing a €40m (£33.8m) fee with Napoli for Kalidou Koulibaly, who is close to sealing a move to Stamford Bridge on a four-year deal.

The agreement came as Raheem Sterling completed his transfer from Manchester City for a fee worth up to £50m on a contract to 2027. The England forward has flown to Los Angeles to join his new teammates on their pre-season tour of America.