Manchester City midfielder
Nasri limped out of the UEFA Champions League defeat to Real Madrid on Tuesday night with a hamstring problem.
And, whilst the problem is not serious, manager
"I do not think he will be ready for Sunday," said Mancini.
"We will try but it is difficult.
"I hope he will be okay for next week."
Italy's all-time leading goalscorer Luigi Riva is leaving his role as a national team staff manager after 50 years of involvement with the Azzurri.