In 2017, she won her first ITF doubles tournament in Caslano, Switzerland, partnering her compatriot Lisa Sabino.

In November 2019, Bandecchi made her WTA Tour debut at the Taipei tournament, where she participated in both singles and doubles.

[citation needed] In 2020, Bandecchi won the ITF tournament in Lousada, Portugal, in singles, beating Dutch player Arianne Hartono in the final.

[citation needed] Together with Lara Salden from Belgium, she also won the doubles title in Lousada.

[2][3] She won her first doubles title at the Ladies Open Lausanne, partnered with Simona Waltert.