Giuseppe Rossi has been left off Italy's 23-man World Cup roster with Lorenzo Insigne selected instead.

The U.S.-born Rossi, 27, missed four months of the season between January and May after suffering a right-knee injury, but he had been given every chance to prove his fitness by Azzurri coach Cesare Prandelli.

Rossi had been Serie A's top scorer until suffering his knee injury in January.

Rossi was also omitted in 2010.

Complete Italy squad:

Goalkeepers: Gianluigi Buffon (Juventus), Mattia Perin (Genoa), Salvatore Sirigu (Paris Saint-Germain).

Defenders: Ignazio Abate (AC Milan), Andrea Barzagli (Juventus), Leonardo Bonucci (Juventus), Giorgio Chiellini (Juventus), Matteo Darmian (Torino), Mattia De Sciglio (AC Milan), Gabriel Paletta (Parma).

Midfielders: Alberto Aquilani (Fiorentina), Antonio Candreva (Lazio), Daniele De Rossi (Roma), Claudio Marchisio (Juventus), Thiago Motta (Paris Saint-Germain), Marco Parolo (Parma), Andrea Pirlo (Juventus), Marco Verratti (Paris Saint-Germain).

Forwards: Mario Balotelli (AC Milan), Antonio Cassano (Parma), Alessio Cerci (Torino), Ciro Immobile (Torino), Lorenzo Insigne (Napoli).