The Italy international, 32,left Juventus in August , when they terminated his contact, ending a 25-year association with the Serie A club.
Marchisio played 389 times for the Bianconeri, winning seven league titles and four Coppas Italia.
The Turin-born player, who suffered a serious knee injury in April 2016 that ruled him out for six months, made 20 appearances last season for Juventus.
He has won 55 caps for Italy since making his debut in 2009.
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