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| 2021 Winners Open | |
|---|---|
| Date | 2–8 August |
| Edition | 1st |
| Category | WTA 250 |
| Draw | 32S / 16D |
| Prize money | $235,000 |
| Surface | Clay |
| Location | Cluj-Napoca, Romania |
| Venue | Winners Sports Club |
| Champions | |
| Singles | |
 Andrea Petkovic | |
| Doubles | |
 Natela Dzalamidze /  Kaja Juvan | |
The 2021 WTA Romanian Open, known as the Winners Open due to sponsorship reasons, was a professional women's tennis tournament played on outdoor clay courts at the Winners Sports Club. It was the 1st edition of the tournament held in the city of Cluj-Napoca and was a part of the 2021 WTA Tour.[1]