Kammala jumla mai zuwa: A cikin 2014, Casella ya fara bugawa Argentina wasa, yana wakiltar ƙungiyar 'yan ƙasa na ƙasa da 18 a wasan neman cancantar shiga wasannin Olympics na matasa na 2014. A gasar, Argentina ta gama a matsayi na farko, tare da Casella ya zira kwallaye 18. Ya wakilci ƙungiyar matasa ta ƙasa a Gasar Junior ta Pan American a Toronto, Kanada. A gasar ya ci kwallaye 18, yana taimakawa Argentina zuwa lambar zinare da cancanta zuwa gasar cin kofin duniya na matasa. Casella ya sake wakiltar Argentina a gasar
Kofin Duniya na Junior a Lucknow, Indiya, inda ƙungiyar ta gama 5th.