Dee ihe na-aga n'ihu maka paragraf a - Dịka akụkụ nke nnwale igwu mmiri Olympic nke Canada na 2021 na Toronto, Mastromatteo meriri agbụrụ 100 m breaststroke. Nke a mere ka o ruo eruo n'egwuregwu Olimpik nke afọ 2020 na Tokyo. O tinyere nke iri atọ na asatọ na okpomọkụ nke 100 m breaststroke, naanị ihe omume ya. O kwuru na isi ihe ọ na-elekwasị anya bụ na 4x100 m medley relay
, ebe ndị otu ụmụ nwoke Canada mere nke ikpeazụ wee nọrọ na nke asaa, ebe Mastromatteo na-egwu mmiri oge ọhụụ kachasị mma na ụkwụ ụkwụ.