| Polish Open Women Qual | 2021/03/25 14:25 | Weronika Gorniak v Simona Pilgaard | W | 0-2 |
| Polish Open Women Qual | 2021/03/25 15:00 | Judith Mair v Ronja Stern | W | 1-2 |
| US Open Women Qual | 2019/07/09 20:20 | Lauren Lam v Ronja Stern | L | 2-0 |
| Canada Open Women | 2019/07/03 17:00 | Porntip Buranaprasertsuk v Ronja Stern | L | 2-0 |
| Spanish Int. Women Qual | 2019/06/13 09:20 | Ronja Stern v Yaelle Hoyaux | W | 2-0 |
| Sudirman Cup Women | 2019/05/24 10:40 | Louisa Ma v Ronja Stern | L | 2-1 |
| Sudirman Cup Women | 2019/05/20 03:30 | Ronja Stern v Gerda Voitechovskaja | W | 2-0 |
| Giraldilla Int. XD | 2018/12/14 13:45 | Ronja Stern v Soraya De Visch Eijbergen | L | 0-2 |
| Giraldilla Int. XD | 2018/11/30 12:15 | Ronja Stern v Tereza Svabikova | W | 2-1 |