The Parkhead side also face eye-catching friendlies against Ajax and Real Madrid but it is the match on July 28 that Commons believes will help them with their European assault.
"I think the way we're preparing for the season and the Champions League qualifiers, our mentality will be to look for the win," he said.
"It will be good to play against an Italian team, to get a sense of their culture and an idea of their tactics. It will be a tough test but it should be a good occasion.
"Hopefully there will be a good crowd there to make it feel a bit like a European night, it will be like a warm-up for the Champions League qualifier in a way."
He added: "The Celtic fans usually turn up, especially when a big team is in town, and it's something the players are looking forward to.
"We're always looking to play opposition who are potentially Champions League winners."
