[3][4] She won the silver medal in the women's 68 kg event at the 2021 World Karate Championships held in Dubai, United Arab Emirates.

[7] A month later, Semeraro won the gold medal in the women's kumite 68 kg event at the 2018 Mediterranean Games held in Tarragona, Spain.

[12][13] In November 2021, Semeraro won the silver medal in the women's 68 kg event at the World Karate Championships held in Dubai, United Arab Emirates.

[18][20] Semeraro won the gold medal in the women's 68 kg event at the 2022 World Games held in Birmingham, United States.

[21][22] Semeraro won one of the bronze medals in the women's 68 kg event at the 2023 European Karate Championships held in Guadalajara, Spain.