In August 2021 Diniz participated in the Brazilian Championships, where she took bronze in the 2nd level category.[2] In July 2022 she took part in the same competition, being 7th in the 1st level category.[3] She made her international debut in early December 2022, her first year as a junior, when she was selected for the South American Championships in Paipa.[4][5] In Colombia, age group category (13 years old), she won gold in the All-Around, with hoop and in team along Julia Bessa and Fernanda Alvaz, as well as silver with ball and ribbon.[6]
In 2024 she became age eligible for senior competitions and, in June, she won bronze in the All-Around, bronze with ribbon and silver with ball and clubs in the 1st level category at nationals.[7][8] In November she was called up for the South American Championships in Santiago winning bronze with clubs, silver with hoop and gold in teams (along Marianne Giovacchini and Geane Silva) in the Cup part of the competition.[9][10][11]
At the 2025 Brazilian Championships she was 5th overall.[12] In September she won silver with hoop, with clubs and with ribbon, gold in the All-Around, with ball and in teams (with Fernanda Alvaz and Stefhany Popoatzki) in the Cup part of the South American Championships in Cochabamba.[13][14]
Brazil 
Brazil 
