| ITF W25 Naples | 05/05 14:00 | 25 | [307] Irina Fetecau v Catherine Harrison [299] | 6-1,6-2 | |
| ITF W60 Charlottesville | 04/27 15:50 | 54 | [267] Jamie Loeb v Catherine Harrison [299] | 6-4,6-2 | |
| ITF W60 Charlottesville | 04/26 17:25 | 54 | Rosie Johanson v Catherine Harrison | 4-6,0-6 | |
| WTA Charleston | 04/03 17:25 | 14 | [293] Catherine Harrison v Kateryna Bondarenko [245] | 7-5,2-6,3-6 | |
| UTR Pro Tennis Series Atlanta - nők | 03/30 15:30 | - | Anastasia Sysoeva v Catherine Harrison | 3-6,4-6 | |
| ITF W25 Newport - strand | 03/04 18:00 | 25 | [290] Catherine Harrison v Hanna Chang [306] | 3-6,4-6 | |
| ITF W25 Boca Raton | 02/25 18:20 | 26 | [219] Claire Liu v Catherine Harrison [289] | 6-4,6-2 | |
| ITF W25 Boca Raton | 02/24 18:00 | 25 | [363] Beatriz Haddad Maia v Catherine Harrison [289] | 6-4,4-6,3-6 | |
| ITF W25 Boca Raton | 02/23 17:45 | 54 | [289] Catherine Harrison v Amina Anshba [339] | 7-6,5-7,10-4 | |
| ITF W25 Boca Raton | 02/22 15:00 | 54 | Catherine Harrison v Tara Moore | 6-3,6-4 | |
| 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 Reese Brantmeier | 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 Bianca Turati [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 | |
| ITF W100 Nicholasville | 02/10 23:45 | 54 | [256] Catherine Harrison v Katie Volynets [388] | 3-6,4-6 | |
| ITF W100 Midland | 02/07 19:00 | 27 | [329] Jamie Loeb v Catherine Harrison [278] | 6-4,6-3 | |
| ITF W100 Midland | 02/06 17:00 | 26 | [278] Catherine Harrison v Francesca Di Lorenzo [118] | 6-3,6-0 | |
| ITF W100 Midland | 02/04 21:00 | 25 | [180] Sara Errani v Catherine Harrison [278] | 4-6,3-6 | |
| WTA Newport Beach | 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] Tara Moore 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 | |
| ITF W25 Tucson | 11/23 17:50 | 27 | [462] Olivia Tjandramulia v Catherine Harrison [300] | 6-3,0-6,10-6 | |
| ITF W25 Tucson | 11/22 22:25 | 26 | [406] Jennifer Elie v Catherine Harrison [300] | 3-6,3-6 |