The Daily Mirror is reporting that Manchester United are interested in a deal to sign the Ivory Coast international ahead of the new Premier League season.
The same article states that the 20-time English champions are desperate to sign a world-class centre-half to improve Ole Gunnar Solskjaer’s defence.
According to the same story, Napoli will look to secure a world-record fee for Koulibaly before the Italian side will consider selling the African star.
Koulibaly has been regularly linked with a move to Manchester United over the past 12 months throughout the Red Devils’ defensive woes.
The 27-year-old has scored two goals and has made two assists in 34 games in the Premier League this season.
Manchester United are bound to be linked with a host of defenders in the summer transfer window as Solskjaer looks to revamp his defence.
The Red Devils conceded 54 times in 38 games in the Premier League this season to highlight their problems at the back under both Jose Mourinho and Solskjaer.
The Old Trafford outfit finished in sixth place in the table and a staggering 32 points adrift of Premier League champions Manchester City.
Manchester United won’t compete in the Champions League next term after their disappointing league campaign.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news