The transfer guru regrets his decision to allow the Italy international to move on, while he is happy Milan eventually missed out on Jackson Martinez.
AC Milan CEO Adriano Galliani has admitted that allowing Andrea Pirlo to leave the club for Juventus in the summer of 2011 was the biggest mistake of his career.
The 36-year-old was deemed surplus to requirements by then Milan coach Massimiliano Allegri and was eventually snapped up by Juventus on a free transfer.
Pirlo proved Milan wrong by guiding Juventus to four consecutive Serie A titles, though, and Galliani has conceded he should have held on to the gifted playmaker.