[6] Polleres won one of the bronze medals in the girls' 63 kg event at the 2014 Summer Youth Olympics held in Nanjing, China.

In that same year, Polleres won the silver medal in the women's 70 kg event at the 2017 European U23 Judo Championships held in Podgorica, Montenegro.

In 2018, Polleres won the gold medal in the women's 70 kg event at the European U23 Judo Championships held in Győr, Hungary.

In 2020, Polleres was eliminated in her first match in the women's 70 kg event at the European Judo Championships held in Prague, Czech Republic.

[14] She took part in the 2024 Olympic Games both in the -70 kg weight class and in the mixed team (together with Lubjana Piovesana, Katharina Tanzer, Samuel Gaßner, Wachid Borchashvili and Aaron Fara).