| Latvia Int. Women | 2021/08/27 15:30 | Heli Neiman v Stern, Ronja | L | 2-1 |
| Denmark Masters Women | 2021/08/06 11:15 | Stern, Ronja v Amalie Schulz | L | 0-2 |
| Denmark Masters Women Qual | 2021/08/05 16:20 | Stern, Ronja v Ivorra, N. | W | 2-0 |
| Denmark Masters Women Qual | 2021/08/05 14:20 | Ann-Sofie Husher Ruus v Stern, Ronja | W | 1-2 |
| Open de Pologne - Femmes - Qualif. | 2021/03/25 16:00 | Simona Pilgaard v Stern, Ronja | L | 2-1 |
| Open de Pologne - Femmes - Qualif. | 2021/03/25 15:00 | Mair, Judith v Stern, Ronja | W | 1-2 |
| US Open Women Qual | 2019/07/09 20:20 | Lauren Lam v Stern, Ronja | L | 2-0 |
| Canada Open Women | 2019/07/03 17:00 | Buranaprasertsuk, Porntip v Stern, Ronja | L | 2-0 |
| Italian Int. Women Qual | 2021/12/16 21:48 | Lucie Amiguet v Kaloyana Nalbantova | W | 0-2 |
| Italian Int. Women Qual | 2021/12/16 15:00 | Kaloyana Nalbantova v Elena-Alexandra Diordiev | W | 2-0 |
| Slovenia Future Series Women | 2021/11/26 11:30 | Kaloyana Nalbantova v Jaymie Laurens | L | 1-2 |
| Bulgarian Int. Women | 2021/10/09 13:40 | Kaloyana Nalbantova v Ozge Bayrak | L | 0-2 |
| Bulgarian Int. Women | 2021/10/09 08:10 | Kaloyana Nalbantova v Clara Lassaux | W | 2-0 |
| Bulgarian Int. Women | 2021/10/08 14:10 | Kaloyana Nalbantova v Hristomira Popovska | W | 2-1 |
| Bulgarian Int. Women | 2021/10/08 10:40 | Milena Schnider v Kaloyana Nalbantova | W | 0-2 |
| Bulgarian Int. Women Qual | 2021/10/07 14:35 | Alisa Kironda v Kaloyana Nalbantova | W | 0-2 |