Kammala wannan jumla: A cikin 1934, Guarisi, a matsayin ɗan mahaifiyar Italiya, yana da 'yancin ɗan ƙasa na Italiya kuma an zaɓe shi don
1934 tawagar gasar cin kofin duniya, a cikin tsari zama na farko Brazilian-haife player lashe gasar cin kofin duniya. A cikin wasan neman cancantar da Italiya ta buga (a kan Girka), Guarisi ya zira kwallaye na farko na "Azzurra" a wasan neman cancantar gasar cin kofin duniya. A wannan wasan, ya taka leda tare da abokin aikinsa na Lazio, Fantoni II.