Stadium: Court 7 Round: 45 Ground: Hardcourt outdoor
| ITF W25 Istanbul | 2021/10/24 10:55 | Arlinda Rushiti v Katherine Westbury | 6-3,7-6 |
| UTR Pro Tennis Series Barcelona - nők | 2021/10/09 08:30 | Katherine Westbury v Sapfo Sakellaridi | 3-6,2-5 |
| UTR Pro Tennis Series Barcelona - nők | 2021/10/08 14:30 | Gloria Alogo Piqueras v Katherine Westbury | 4-6,3-5 |
| UTR Pro Tennis Series Barcelona - nők | 2021/10/07 08:00 | Kiara Cvetkovic v Katherine Westbury | 2-6,2-6 |
| UTR Pro Tennis Series Barcelona - nők | 2021/10/06 11:00 | Berta M Avante v Katherine Westbury | 2-6,3-6 |
| UTR Pro Tennis Series Barcelona - nők | 2021/10/04 12:00 | Claudia Hoste Ferrer v Katherine Westbury | 6-4,1-6,4-5 |
| ITF W25 Bécs | 2021/08/29 07:30 | Katherine Westbury v Aneta Kucmova | 3-6,3-6 |
| ITF W15 Bad Waltersdorf | 2021/08/26 11:20 | Katherine Westbury v Elena-Teodora Cadar | 2-6,2-6 |
| ITF W15 Monastir | 2021/10/28 09:50 | Sarah Iliev v Mia Mack | 6-2,4-6,1-6 |
| ITF W15 Monastir | 2021/10/27 13:45 | Yasmine Mansouri v Sarah Iliev | 6-2,3-6,4-6 |
| ITF W15 Monastir | 2021/10/25 11:00 | Ferdaous Bahri v Sarah Iliev | 5-7,6-7 |
| ITF W15 Monastir | 2021/10/24 12:30 | Arianna Nepomuceno v Sarah Iliev | 2-6,2-6 |
| ITF W25 Denain | 2021/06/14 09:15 | Sarah Iliev v Manon Arcangioli | 5-7,7-6,6-10 |
| ITF W25 Manacor | 2021/03/10 08:30 | Leyre Romero Gormaz v Sarah Iliev | 5-7,6-3,10-4 |
| ITF W25 Manacor | 2021/03/09 09:00 | Sarah Iliev v Warona Mdlulwa | 6-3,6-3 |
| ITF W15 Manacor | 2021/01/24 13:00 | Sarah Iliev v Jenifer Anger | 3-6,6-4,8-10 |