| ITF W25 Las Vegas | 03/02 18:00 | 54 | Katie Volynets v Sofia Sewing | 6-7,2-6 | |
| WTA Acapulco | 02/26 23:55 | 26 | [270] Renata Zarazua v Katie Volynets [384] | 4-6,7-5,6-0 | |
| WTA Acapulco | 02/26 01:20 | 25 | [114] Shelby Rogers v Katie Volynets [384] | 2-6,6-7 | |
| ITF W100 Nicholasville | 02/11 18:35 | 54 | [388] Katie Volynets v Elizabeth Halbauer [307] | 3-6,6-7 | |
| ITF W100 Nicholasville | 02/10 23:45 | 54 | [256] Catherine Harrison v Katie Volynets [388] | 3-6,4-6 | |
| ITF W100 Midland | 02/05 17:30 | 25 | [204] Jessika Ponchet v Katie Volynets [402] | 6-2,6-2 | |
| ITF W100 Midland | 02/04 16:25 | 54 | [374] Aldila Sutjiadi v Katie Volynets [402] | 6-7,1-6 | |
| ITF W100 Midland | 02/03 16:45 | 54 | Nika Kukharchuk v Katie Volynets | 0-6,2-6 | |
| WTA Newport Beach | 01/27 20:15 | 24 | [394] Katie Volynets v Grace Min [281] | 3-6,5-7 | |
| ITF W25 Malibu | 01/16 20:00 | 26 | [328] Jessica Pieri v Katie Volynets [394] | 6-3,2-6,6-4 | |
| ITF W25 Malibu | 01/15 00:10 | 25 | [394] Katie Volynets v Fernanda Contreras Gomez [465] | 6-1,6-2 | |
| ITF W25 Tucson | 11/23 20:45 | 28 | Hailey Baptiste v Katie Volynets | 6-1,7-6 | |
| ITF W25 Tucson | 11/23 16:30 | 27 | [175] Vladica Babic v Katie Volynets [389] | 1-6,0-6 | |
| ITF W25 Tucson | 11/23 00:00 | 26 | Katie Volynets v Haley Giavara | Retired | |
| ITF W25 Tucson | 11/20 19:30 | 25 | [385] Giuliana Olmos v Katie Volynets [389] | 6-4,0-6,3-6 | |
| ITF W25 Malibu | 11/10 18:00 | 29 | [438] Katie Volynets v Bianca Turati [371] | 6-4,4-6,4-6 | |
| ITF W25 Malibu | 11/09 21:25 | 28 | Katie Volynets v Katrina Scott | 6-2,6-2 | |
| ITF W25 Malibu | 11/08 17:55 | 27 | Ashley Lahey v Katie Volynets | 6-2,2-6,3-6 | |
| ITF W25 Malibu | 11/07 22:40 | 26 | [438] Katie Volynets v Leonie Kung [330] | 7-6,6-4 | |
| ITF W25 Malibu | 11/05 23:35 | 25 | [497] Pamela Montez v Katie Volynets [438] | 5-7,1-6 | |
| WTA Luxembourg | 10/14 11:00 | 25 | Viktoria Kuzmova v Katie Volynets | 6-7,7-6,6-1 | |
| ITF W60 Templeton | 09/26 18:15 | 26 | [303] Shelby Rogers v Katie Volynets [395] | 6-1,6-1 | |
| ITF W60 Templeton | 09/25 20:30 | 25 | [395] Katie Volynets v Deniz Khazaniuk [276] | 1-6,6-1,6-0 | |
| US Open Women | 08/27 17:20 | 23 | [413] Katie Volynets v Bianca Andreescu [15] | 2-6,4-6 | |
| WTA San Jose | 07/27 21:15 | 64 | [388] Katie Volynets v Kristie Ahn [176] | 5-7,0-6 | |
| ITF W60 Berkeley | 07/18 00:00 | 25 | [393] Katie Volynets v Caroline Dolehide [256] | 7-5,2-6,6-7 | |
| ITF W60 Honolulu | 07/09 23:10 | 54 | Katie Volynets v Sophia Whittle | 7-5,1-6,7-10 | |
| ITF W60 Honolulu | 07/08 23:10 | 54 | Katie Volynets v Alexandra Osborne | 6-1,7-5 | |
| ITF W25 Sumter | 06/13 14:00 | 26 | [407] Katie Volynets v Marcela Zacarias [440] | 3-6,1-6 | |
| ITF W25 Sumter | 06/11 17:35 | 25 | Katie Volynets v Carly Briggs | 6-3,6-4 |