The striker scored 10 times as Juve won Serie A last season, but with the Turin giants reportedly lining up moves for Robin van Persie and Mattia Destro, the 27-year old has been linked with a transfer to the club where he started his professional career.
During Milan's 1-0 defeat to the Bianconeri in the pre-season meeting on Saturday, Bonera is reported to have said, "Will you come to Milan?" to Matri, who replied "I'll see".
The Old Lady's victory over the Rossoneri came after they had lost their first 45-minute match 1-0 to Inter, with new signing and former Nerazzurri man Lucio at fault for Philippe Coutinho's goal.
Andrea Stramaccioni's side secured their third successive victory in the pre-season event by beating their city rivals 2-1 in the final match of the night, courtesy of goals from Fredy Guarin and new signing Rodrigo Palacio.
Milan are in need of a striker to boost their attack after selling Zlatan Ibrahimovic to Paris Saint-Germain for €23 million.