The two coaches are former teammates and Pirlo has been following Benevento's progress closely this season.
He said, “I haven't spoken to Pippo lately, but I always follow his progress with affection. He did so well to win the Serie B title last year and is proving himself to be an excellent coach.
“It's an important game and comes just before a break for international duty, so it's possible minds will wander towards what's happening next week.
“However, this is a fundamental match for our campaign, we are up against a team in a good period of form, I know their coach well and he'll come here trying to get a result."