| ITF W25 Sumter | 2021/06/16 15:30 | Catherine Harrison v Paige Mary Hourigan | 5-7,0-6 |
| ITF W25 Pelham | 2021/05/19 19:50 | Catherine Harrison v Mirjam Bjorklund | 2-6,3-6 |
| ITF W100 Bonita Springs | 2021/05/12 13:50 | Katie Volynets v Catherine Harrison | 6-3,6-2 |
| ITF W100 Bonita Springs | 2021/05/11 16:15 | Catherine Harrison v Victoria Duval | 1-6,4-6 |
| ITF W100 Bonita Springs | 2021/05/10 23:50 | Gabriela Talaba v Catherine Harrison | 4-6,1-6 |
| ITF W25 Naples | 2021/05/05 14:00 | Irina Fetecau v Catherine Harrison | 6-1,6-2 |
| ITF W60 Charlottesville | 2021/04/27 15:50 | Jamie Loeb v Catherine Harrison | 6-4,6-2 |
| ITF W60 Charlottesville | 2021/04/26 17:25 | Rosie Johanson v Catherine Harrison | 4-6,0-6 |