The 22-year-old has been a huge miss for the 16th-placed Serie A outfit, having started the campaign with seven goals in six appearances in all competitions before suffering the injury in late August.
Berardi has been working his way back to full fitness since and reports are suggesting that he will be back before the winter break in Italy.
It is hoped he will be ready for the game against Fiorentina on December 12, but the following matches against Inter Milan and Cagliari before Christmas are possibilities if he does not line up against La Viola.
It will be welcome news for coach Eusebio Di Francesco, who lost midfielder Davide Biondini to an Achilles tendon rupture against Athletic Bilbao last week.
Southampton have announced plans for a two-week tour of China as part of their pre-season preparations for the 2018-19 season.