| ITF W50 Nonthaburi | 01/05 03:00 | 27 | [14] Ena Shibahara v Catherine Harrison [344] | 6-3,6-3 | |
| ITF W50 Nonthaburi | 01/04 03:00 | 26 | [448] Peangtarn Plipuech v Catherine Harrison [344] | 2-6,6-2,4-6 | |
| ITF W50 Nonthaburi | 01/02 04:50 | 25 | [344] Catherine Harrison v Lanlana Tararudee [240] | 6-3,6-3 | |
| ITF W25 Austin | 11/17 16:55 | 27 | [369] Madison Sieg v Catherine Harrison [362] | 7-5,6-3 | |
| ITF W25 Austin | 11/16 18:35 | 26 | Catherine Harrison v Mao Mushika | 6-3,6-4 | |
| ITF W25 Austin | 11/15 15:55 | 25 | Catherine Harrison v Kimmi Hance | 6-1,6-3 | |
| WTA Midland | 10/29 18:10 | 14 | [217] Jana Kolodynska v Catherine Harrison [272] | 6-2,3-6,6-4 | |
| ITF W80 Tyler | 10/23 22:30 | 54 | Mercedes Aristegui v Catherine Harrison | Retired | |
| ITF W80 Macon | 10/17 18:05 | 25 | [244] McCartney Kessler v Catherine Harrison [247] | 6-1,7-5 | |
| ITF W25 Florencia | 10/11 20:25 | 25 | Fiona Crawley v Catherine Harrison | 7-6,6-2 | |
| ITF W25 Florencia | 10/10 13:50 | 54 | [413] Ava Markham v Catherine Harrison [248] | 4-6,5-7 | |
| ITF W25 Florencia | 10/09 14:00 | 54 | Ariana Arseneault v Catherine Harrison | 2-6,2-6 | |
| ITF W60 Templeton | 09/28 19:55 | 26 | [223] Catherine Harrison v Iryna Shymanovich [171] | 0-6,6-7 | |
| ITF W60 Templeton | 09/27 20:00 | 25 | Jessie Aney v Catherine Harrison | 0-6,0-6 | |
| ITF W60 Templeton | 09/27 19:00 | 25 | Marcela Zacarias v Catherine Harrison | Cancelled | |
| ITF W60 Templeton | 09/26 18:15 | 54 | [383] Maria F H Gonzalez v Catherine Harrison [223] | 0-6,5-7 | |
| ITF W60 Templeton | 09/25 19:20 | 54 | [223] Catherine Harrison v Alana Smith [323] | 6-3,2-6,6-2 | |
| ITF W60 Berkeley | 09/18 21:25 | 54 | Yasmine Kabbaj v Catherine Harrison | 6-2,4-6,7-6 | |
| ITF W100 Tokio | 09/03 02:25 | 54 | [223] Xiaodi You v Catherine Harrison [171] | 6-3,7-6 | |
| ITF W60 Calgary | 11/07 21:40 | 25 | [282] Catherine Harrison v Urszula Radwanska [389] | 2-6,1-6 | |
| WTA Midland | 10/30 18:00 | 14 | [191] Diana Shnaider v Catherine Harrison [269] | 6-4,6-2 | |
| ITF W60 Saguenay | 10/22 14:00 | 26 | Michaela Bayerlova v Catherine Harrison | Cancelled | |
| ITF W60 Saguenay | 10/21 14:55 | 27 | [251] Francesca Di Lorenzo v Catherine Harrison [259] | 2-6,7-6,7-6 | |
| ITF W60 Saguenay | 10/19 14:00 | 26 | Johanne C Svendsen v Catherine Harrison | 2-6,3-6 | |
| ITF W60 Saguenay | 10/17 16:45 | 25 | Ana Grubor v Catherine Harrison | 5-7,3-6 | |
| ITF W25 Fredericton | 10/13 15:15 | 26 | [465] Stacey Fung v Catherine Harrison [217] | 6-4,3-6,6-3 | |
| ITF W25 Fredericton | 10/11 15:30 | 25 | Nifemi Akinbiyi v Catherine Harrison | 4-6,2-6 | |
| ITF W80 Rancho Santa Fe | 10/05 19:40 | 25 | [214] Catherine Harrison v Robin Montgomery [297] | 4-6,6-7 | |
| ITF W25 Austin | 09/28 18:25 | 25 | Madison Sieg v Catherine Harrison | 1-6,6-4,7-6 | |
| US Open - Femenino | 08/30 15:00 | 23 | [243] Catherine Harrison v Aryna Sabalenka [6] | 1-6,3-6 |