| ITF W25 Orlando | 02/16 14:50 | 54 | [288] Catherine Harrison v Maria Lourdes Carle [445] | 1-6,3-6 | |
| ITF W25 Orlando | 02/15 17:00 | 54 | Catherine Harrison v Brantmeier, Reese | 6-7,6-2,10-8 | |
| ITF W60 Rome GA | 01/27 19:55 | 25 | [285] Catherine Harrison v Emina Bektas [421] | 0-6,2-6 | |
| WTA - Abu Dhabi | 01/05 12:00 | 64 | [280] Catherine Harrison v Turati, Bianca [318] | 4-6,7-6,1-6 | |
| ITF W25 Orlando | 11/13 16:40 | 26 | [221] Claire Liu v Catherine Harrison [281] | 7-5,6-1 | |
| ITF W25 Orlando | 11/11 17:30 | 25 | [281] Catherine Harrison v Ankita Raina [179] | 6-4,7-5 | |
| ITF W80 Tyler | 10/26 17:40 | 54 | [280] Catherine Harrison v Kyoka Okamura [235] | 6-7,7-5,6-10 | |
| ITF W80 Macon | 10/19 16:50 | 54 | [149] Renata Zarazua v Catherine Harrison [280] | 7-5,6-1 | |
| WTA Prague | 08/30 08:00 | 24 | [322] Ana Sofia Sanchez v Catherine Harrison [263] | 3-6,6-4,7-6 | |
| WTA Lexington | 08/09 19:50 | 45 | [259] Catherine Harrison v Arina Rodionova [157] | 6-4,3-6,2-6 | |
| Nicholasville, Singles Qualifying W-ITF-USA-05A | 02/10 23:45 | 54 | [256] Catherine Harrison v Katie Volynets [388] | 3-6,4-6 | |
| Midland, Simples W-ITF-USA-03A | 02/07 19:00 | 27 | [329] Jamie Loeb v Catherine Harrison [278] | 6-4,6-3 | |
| Midland, Simples W-ITF-USA-03A | 02/06 17:00 | 26 | [278] Catherine Harrison v Di Lorenzo, Francesca [118] | 6-3,6-0 | |
| Midland, Simples W-ITF-USA-03A | 02/04 21:00 | 25 | [180] Sara Errani v Catherine Harrison [278] | 4-6,3-6 | |
| Newport Beach, USA | 01/27 18:30 | 24 | [289] Catherine Harrison v Amandine Hesse [251] | 4-6,5-7 | |
| ITF W25 Malibu | 01/17 19:00 | 27 | [328] Jessica Pieri v Catherine Harrison [289] | 6-2,6-7,7-5 | |
| ITF W25 Malibu | 01/16 19:00 | 26 | [460] Moore, Tara v Catherine Harrison [289] | Retired | |
| ITF W25 Malibu | 01/15 22:15 | 25 | [398] Laura Pigossi v Catherine Harrison [289] | 4-6,6-4,1-6 | |
| Tucson, Singles W-ITF-USA-46A | 11/23 17:50 | 27 | [462] Olivia Tjandramulia v Catherine Harrison [300] | 6-3,0-6,10-6 | |
| Tucson, Singles W-ITF-USA-46A | 11/22 22:25 | 26 | [406] Elie, Jennifer v Catherine Harrison [300] | 3-6,3-6 | |
| Tucson, Singles W-ITF-USA-46A | 11/20 19:25 | 25 | Prelle, Kirsten v Catherine Harrison | 1-6,5-7 | |
| Houston, USA | 11/10 20:25 | 24 | [268] Catherine Harrison v Giuliana Olmos [344] | 4-6,3-6 | |
| ITF W60 Toronto | 11/01 15:00 | 27 | [302] Catherine Harrison v Di Lorenzo, Francesca [137] | 7-6,1-6,4-6 | |
| ITF W60 Toronto | 10/31 13:55 | 26 | [302] Catherine Harrison v Arianne Hartono [466] | 6-4,6-1 | |
| 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 Fernandez, Leylah Annie [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 Schaefer, Dominique | 6-4,6-0 | |
| Claremont, Singles Qualifying W-ITF-USA-48A | 10/11 20:10 | 27 | [351] Giuliana Olmos v Catherine Harrison [307] | 1-6,7-6,6-4 |