The 17-year-old centre-back plays for Paris Saint-Germain but has made only six Ligue 1 appearances this season.
In those appearances Kouassi scored two goals, highlighting his attacking threat besides his defensive skills.
Kouassi is out of contract at PSG this summer and the French club have been trying to renew his deal.
English trio Manchester City, Newcastle and Leeds have also been mentioned in the British press.
However, TMW claims that Kouassi is ‘approaching Milan with [Ralf] Rangnick’ and say the deal is a ‘work in progress’.