The 41-year-old left Juventus last summer in an emotional farewell, having spent 17 seasons with the club.
He spent one season inPariswith PSG, winning the Ligue 1 title before deciding to make a return to the club where he has spent the vast majority of his career.
He is expected to sign a 12-month contract that will see him work with current No. 1Wojciech Szczesnybefore possibly transitioning to a coaching or ambassadorial role.
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With Juventus he has won nine Serie A titles and four Coppa Italias.