| ITF W15 Antalya | 2021/11/15 06:30 | Victoria Gomez v Klara Ondrejcekova | 1-6,6-4,10-3 |
| ITF W15 Antalya | 2021/11/08 07:00 | Klara Ondrejcekova v Vasilisa Belonog | 6-3,3-6,3-10 |
| ITF W25 Jablonec nad Nisou | 2021/09/13 08:00 | Klara Ondrejcekova v Zeynep Sonmez | 0-6,1-6 |
| ITF Women Varna | 2021/09/05 13:00 | Klara Ondrejcekova v Ana Mukic | 2-6,4-6 |
| ITF W15 Bad Waltersdorf | 2021/08/23 07:00 | Giulia Carbonaro v Klara Ondrejcekova | 6-7,6-1,10-5 |
| ITF W15 Antalya | 2021/06/08 07:00 | Ivania Martinich v Klara Ondrejcekova | 6-0,6-0 |
| ITF W15 Antalya | 2021/06/07 07:00 | Daria Zelinskaya v Klara Ondrejcekova | 6-4,3-6,3-10 |
| ITF W15 Antalya | 2021/06/01 07:00 | Klara Ondrejcekova v Lexington Reed | 5-7,3-6 |