 Yatanguye urukino rwo gukubitana ingumu afise imyaka 12, akaba yararonse umudari winzahabu mu bafise ibiro bicirirtse mu nkino za Olympic zo mu 1960 i Rome Ahavuye isanamu, Getty Images Insiguro yisanamu, Clay yagize urwo rukino umwuga mu kwezi kwa cumi mu 1960 afise imyaka 18, aratsinda inkino 18 imbere yo kuja mu Bwongereza mu kwezi kwa gatandatu mu 1963, mu rukino rwa mbere yagize yemerewe amafaranga, mu kindi gihugu, akaba yari yavuze ko azotsinda rurangiranwa wo muri ico gihugu Henry Cooper mu gice round kigira gatanu. 