The France international joined the Blues in June 2023 from RB Leipzig, but was restricted to 14 appearances and three goals in his debut campaign due to injury.
Advertisement
Advertisement
In total, Nkunku struck 18 goals in 62 appearances for the Blues.
He moves to Milan for a mooted €42-45m.
Nkunku has signed a deal with Milan to 2030 and will wear the No18 shirt.