| ITF W60 Toronto | 10/30 16:30 | 25 | [177] Robin Anderson v Catherine Harrison [302] | 6-1,6-7,5-7 | |
| ITF W25 Waco | 10/19 17:20 | 28 | [305] Catherine Harrison v Leylah Annie Fernandez [248] | 1-6,4-6 | |
| ITF W25 Waco | 10/18 18:40 | 27 | [305] Catherine Harrison v Katie Swan [261] | 4-6,7-5,6-2 | |
| ITF W25 Waco | 10/17 19:40 | 26 | [305] Catherine Harrison v Natalia Siedliska [459] | 6-3,6-2 | |
| ITF W25 Waco | 10/16 18:10 | 25 | Catherine Harrison v Dominique Schaefer | 6-4,6-0 | |
| ITF W25 Claremont | 10/11 20:10 | 27 | [351] Giuliana Olmos v Catherine Harrison [307] | 1-6,7-6,6-4 | |
| ITF W25 Claremont | 10/10 18:00 | 26 | [351] Alicia Barnett v Catherine Harrison [307] | 5-7,6-7 | |
| ITF W25 Claremont | 10/09 22:50 | 25 | Anna Morgina v Catherine Harrison | 0-6,6-7 | |
| ITF W60 Templeton | 09/26 17:00 | 26 | Catherine Harrison v Elysia Bolton | 3-6,7-6,3-6 | |
| ITF W60 Templeton | 09/25 17:00 | 25 | [151] Ann Li v Catherine Harrison [318] | 7-5,4-6,3-6 | |
| ITF W25 Redding | 09/11 17:00 | 25 | [439] Ashley Kratzer v Catherine Harrison [310] | 7-6,6-3 | |
| WTA New Haven | 09/04 15:25 | 25 | [81] Pauline Parmentier v Catherine Harrison [322] | 7-5,6-4 | |
| WTA New Haven | 09/03 15:20 | 24 | [322] Catherine Harrison v Fanny Stollar [209] | 4-6,6-2,6-3 | |
| ITF W100 Vancouver | 08/12 23:00 | 45 | [77] Ena Shibahara v Catherine Harrison [327] | 6-4,6-4 | |
| ITF W100 Vancouver | 08/12 17:00 | 45 | [83] Alexa Guarachi v Catherine Harrison [327] | 6-7,6-7 | |
| ITF W60 Landisville | 08/07 15:20 | 25 | [148] Harriet Dart v Catherine Harrison [390] | 7-5,3-6,6-1 | |
| ITF W25 Fort Worth | 08/04 15:00 | 29 | Chanelle Van Nguyen v Catherine Harrison | 4-6,0-6 | |
| ITF W25 Fort Worth | 08/03 17:15 | 28 | [485] Alexa Glatch v Catherine Harrison [373] | 7-5,1-6,0-6 | |
| ITF W25 Fort Worth | 08/02 14:00 | 27 | [485] Nagi Hanatani v Catherine Harrison [373] | 3-6,1-6 | |
| ITF W25 Fort Worth | 08/01 16:00 | 26 | Ellie Douglas v Catherine Harrison | 2-6,6-7 | |
| ITF W25 Fort Worth | 07/31 22:50 | 25 | McCartney Kessler v Catherine Harrison | 1-6,2-6 | |
| ITF W60 Ashland | 07/25 14:00 | 26 | [377] Catherine Harrison v Ellen Perez [197] | 6-1,3-6,2-6 | |
| ITF W60 Ashland | 07/24 16:45 | 25 | [323] Ayaka Okuno v Catherine Harrison [377] | 4-6,2-6 | |
| ITF W60 Berkeley | 07/16 19:00 | 54 | [380] Catherine Harrison v Hanna Chang [446] | 3-6,4-6 | |
| ITF W60 Berkeley | 07/15 21:05 | 54 | [380] Catherine Harrison v Dabin Kim [479] | 6-1,6-3 | |
| ITF W60 Honolulu | 07/09 23:30 | 25 | [211] Arina Rodionova v Catherine Harrison [361] | 6-4,6-2 | |
| ITF W25 Hong Kong | 06/01 02:00 | 27 | Jia-Jing Lu v Catherine Harrison | 6-2,6-4 | |
| ITF W25 Hong Kong | 05/31 08:20 | - | [226] Jia-Jing Lu v Catherine Harrison [374] | 6-2,5-4 | |
| ITF W25 Hong Kong | 05/31 03:00 | 26 | Misaki Matsuda v Catherine Harrison | 4-6,1-6 | |
| ITF W25 Hong Kong | 05/30 02:00 | 25 | Yexin Ma v Catherine Harrison | 2-6,6-7 |