2021 Koser Jewelers Tennis Challenge – Singles
| Singles | |
|---|---|
| 2021 Koser Jewelers Tennis Challenge | |
| Champion | Nuria Párrizas Díaz |
| Runner-up | Greet Minnen |
| Score | 7–6(8–6), 4–6, 7–6(9–7) |
Madison Brengle was the defending champion, having won the previous edition in 2019, but lost in the second round to Lesley Pattinama Kerkhove.
Nuria Párrizas Díaz won the title, defeating Greet Minnen in the final, 7–6(8–6), 4–6, 7–6(9–7).