Dee ihe na-aga n'ihu maka paragraf a - Roberts nwere ọfụma na mmetụta dị ukwuu n'ọrụ ntorobịa maka ndị otu mba Australia. Roberts mere egwuregwu mba ụwa mbụ ya na 2009 FIBA Oceania Under-16 Championship na Brisbane, Australia, ebe ọ gara Gold wee nweta ebe Australia nọ na mmeghe Under-17 World Championship n'afọ na-eso ya. Roberts ga-aga n'ihu na-anọchite anya Australia na FIBA World Championship na France ebe Australia nọ na asaa. Na asọmpi a, Roberts nwetara akara 16.1 n'egwuregwu ọ bụla. Mgbe ahụ, ọ gbanwere iji nọchite anya Gems na 2011 FIBA Under-19 World Championship
na Chile. N'asọmpi a, ọ bụ onye kachasị agba bọọlụ na egwuregwu ọ bụla, na-agba bọọlụ 41 megide Japan. N'agbanyeghi na ha nwetara akara 15.9 n'otu egwuregwu n'otu egwuregwu siri ike nke ndị Australia, ndị otu ahụ agbagharala ọla nchara, wee nọrọ n'ọnọdụ nke anọ.