Mats Hummels was able to recover from the latest bout of flu which had kept him out of training on Tuesday and Wednesday.
The German defender was included in group training drills on Thursday as Roma prepared for the match against Napoli.
However, the former Borussia Dortmund centre-back is unlikely to start, given the few opportunities he had to show off under the previous management.
Ranieri seems intent on fielding a four-man defence, with Mancini and Ndicka in the centre, leaving Hummels as the first option on the bench.
