The San Siro giants are poised to complete the transfer of the Brazil international, who will watch his new side take on Torino on Sunday
AC Milan are closing in on the signing of Lucas Paqueta from Flamengo, who has arrived in Italy to undergo a medical.
A number of elite European clubs, including French giants Paris Saint-Germain and Manchester United, were understood to be tracking the Brazilian attacking midfielder before Milan struck a deal to secure his signature.
The Rossoneri are reported to be paying €35 million (£31m/$40m) for the star.
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The 21-year-old scored 10 goals and provided four assists in 39 games in all competitions in the Brazilian season, which has now ended.