Italy will begin their get-together on Monday – except for Roma and Lazio players – ahead of the San Marino friendly on May 31.
Cesare Prandelli has named his squad for the training camp at Coverciano, as preparations begin for the World Cup qualifier against the Czech Republic on June 7 and the Confederations Cup in Brazil.
The 31 players were already called up to Coverciano this week for athletic and fitness tests, then released to go back to their clubs.
Of those players, Federico Marchetti, Antonio Candreva, Daniele De Rossi and Pablo Daniel Osvaldo will not be attending the get-together itself due to their Coppa Italia Final commitments.
Roma and Lazio face each other at the Stadio Olimpico on Sunday at 17.00 UK time. Their players will only unite with the Azzurri from June 2.
On June 3, Prandelli will hand in the final list of 23 names for the Confederations Cup.
Gk: Agazzi (Cagliari), Buffon (Juventus), Marchetti (Lazio), Sirigu (Paris St. Germain);
D: Abate (Milan), Antonelli (Genoa), Astori (Cagliari), Barzagli (Juventus), Bonucci (Juventus), Chiellini (Juventus), De Sciglio (Milan), Maggio (Napoli), Ogbonna (Torino), Ranocchia (Inter);
M: Aquilani (Fiorentina), Bonaventura (Atalanta), Candreva (Lazio), Cerci (Torino), De Rossi (Roma), Diamanti (Bologna), Giaccherini (Juventus), Marchisio (Juventus), Montolivo (Milan), Pirlo (Juventus), Poli (Sampdoria);
F: Balotelli (Milan), El Shaarawy (Milan), Gilardino (Bologna), Giovinco (Juventus), Osvaldo (Roma), Sau (Cagliari)