Pedzisa mutsara unotevera: Sechikamu che2021 Canadian Olympic swimming trials muToronto, Mastromatteo akakunda mujaho wemamita zana. Izvi zvakaita kuti akwanise kuenda kumitambo yeOlympic yeZhizha ya2020 muTokyo. Akaisa makumi matatu nesere mumakwikwi emamita zana, chiitiko chake chega chega. Akataura kuti chinangwa chake chikuru chaiva
4x100 m medley relay, apo chikwata chevarume veCanada chakaita mhedziso uye chakaiswa chechinomwe, naMastromatteo achishambira nguva itsva yakanakisisa ye relay pamusana wechipfuva.