Andre Silva scored with the final kick of the game to lift Milan past Barcelona in both teams' final match of the ICC.
AC Milan have loaned Manuel Locatelli to Sassuolo, who will be obliged to make the move permanent next summer.
The 20-year-old midfielder, who came through the youth ranks with the Rossoneri but struggled to hold down a regular starting berth in their team last term, will look to add to his 48 Serie A outings at the Emilia-Romagna club.
#Calciomercato: Manuel #Locatelli è un calciatore neroverde!
Il comunicato ufficiale è su https://t.co/oqtY5SxBZy#ForzaSasol ?? pic.twitter.com/t3fECSCLuL— U.S. Sassuolo (@SassuoloUS) August 13, 2018
The Italy Under-21 international could make his debut against Milan's city rivals Inter on the opening day of the Serie A season next Sunday evening.
Source: espn.co.uk