Roma will be without Diego Perotti for at least the next two games with Torino and Atalanta due to a muscular problem.
Perotti had already been on the treatment table for most of October and November with a calf injury.
He had only recently returned to the starting XI, but has suffered a relapse.
According to Sky Sport Italia, the Argentine will miss the next two matches against Torino and Atalanta.
Perotti is hoping to be back in action for the showdown with Milan on February 2.