Arsenal's new signing Riccardo Calafiori will wear shirt no 33 (Photos)

Riccardo Calafiori has officially signed a five-year contract with Arsenal and has joined the team in Philadelphia where they are pre season tour. 

The 22-year-old defender, who has previously played for Bologna, will be utilized both as a centre back and a left back. The transfer fee for Calafiori is approximately £42 million.

He will don the number 33 shirt for Arsenal, as shown in his recent shirt unveiling.