The 2021 ITF Women's World Tennis Tour – Bellinzona was a professional women's tennis tournament played on outdoor clay courts. It was the first edition of the tournament which was part of the 2021 ITF Women's World Tennis Tour. It took place in Bellinzona, Switzerland between 5 and 11 April 2021.
Singles main-draw entrants
Seeds
1 Rankings are as of 22 March 2021.
Other entrants
The following players received wildcards into the singles main draw: Ylena In-Albon Valentina Ryser Sebastianna Scilipoti Simona Waltert Joanne Züger
The following player received entry using a junior exempt: Alex Eala
The following players received entry from the qualifying draw: Lucia Bronzetti Lina Gjorcheska Vivian Heisen Seone Mendez Camilla Rosatello Raluca Șerban Lucrezia Stefanini Stephanie Wagner
The following player received entry as a lucky loser: Margot Yerolymos