Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF - W15 Monastir | 2021/11/01 10:30 | Westbury, Katherine v Selya Rakki | 6-0,6-1 |
| ITF - W15 Monastir | 2021/10/31 13:30 | Westbury, Katherine v Sarah Iliev | 6-4,6-3 |
| ITF W25 Istanbul | 2021/10/24 10:55 | Arlinda Rushiti v Westbury, Katherine | 6-3,7-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/10/09 08:30 | Westbury, Katherine v Sapfo Sakellaridi | 3-6,2-5 |
| UTR Pro Tennis Series Barcelona Women | 2021/10/08 14:30 | Alogo Piqueras, Gloria v Westbury, Katherine | 4-6,3-5 |
| UTR Pro Tennis Series Barcelona Women | 2021/10/07 08:00 | Kiara Cvetkovic v Westbury, Katherine | 2-6,2-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/10/06 11:00 | Berta M Avante v Westbury, Katherine | 2-6,3-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/10/04 12:00 | Claudia Hoste Ferrer v Westbury, Katherine | 6-4,1-6,4-5 |
| ITF - W15 Monastir | 2021/10/29 08:30 | Adithya Karunaratne v Simone, Alessandra | 6-3,6-0 |
| ITF - W15 Monastir | 2021/10/28 09:30 | Schmucker, Yvette v Simone, Alessandra | 5-7,2-6 |
| ITF - W15 Monastir | 2021/10/26 10:00 | Simone, Alessandra v Elena Milovanovic | 7-5,6-3 |
| ITF - W15 Monastir | 2021/10/20 13:35 | Tamira Paszek v Simone, Alessandra | 6-4,7-5 |
| ITF - W15 Monastir | 2021/09/22 14:45 | Elena Milovanovic v Simone, Alessandra | 6-2,7-5 |
| ITF - W15 Monastir | 2021/09/16 10:40 | Chanta, Aunchisa v Simone, Alessandra | 6-4,6-2 |
| ITF - W15 Monastir | 2021/09/15 15:45 | Simone, Alessandra v Himari Sato | 7-5,6-3 |
| ITF W15 Cairo | 2021/09/09 11:40 | Nefedova, Anastasia Evgenyevna v Simone, Alessandra | 7-6,4-6,6-3 |