Chelsea complete signing of Napoli defender Kalidou Koulibaly

Kalidou Koulibaly has completed his move to Chelsea (Scott Heavey/PA)

Chelsea have completed the signing of centre-back Kalidou Koulibaly from Napoli for a reported fee of around £34million.

The 31-year-old becomes the club’s second acquisition of the summer following their move for England forward Raheem Sterling from Manchester City.