After a decade with the Rossoneri, the midfielder moved to Turin at the end of last season on a free transfer.
"I'm curious to see Pirlo," the Chelsea legend told Tuttosport on Tuesday. "After 10 years at Milan, he's put himself back up for discussion.
"I want to see how he does for Juventus, but I'm convinced that he will do well."
"Giaccherini has proved himself to be a good player at Cesena," the ex-Italian international noted. "He's got a great opportunity, he just needs to take advantage of it."