Mezue ahịrịokwu na-esonụ: N'afọ 2017, Mastromatteo so na ndị otu meriri ọla edo na 4x100 mixed medley na 2017 World Junior Swimming Championships. N'afọ 2019, Mastromatteo nwetara ihe nrite 3 na
2019 World Junior Swimming Championships na Budapest, gụnyere ọlaọcha ọlaọcha n'otu n'otu na 50 m breaststroke.