| WTA Nottingham | 06/06 12:40 | 25 | [102] Heather Watson v Katie Volynets [123] | 6-4,6-2 | |
| ITF W100 Surbiton | 06/01 15:20 | 25 | [274] Lulu Sun v Katie Volynets [135] | 6-4,6-4 | |
| French Open Women | 05/26 11:25 | 24 | [135] Katie Volynets v Elena Rybakina [16] | 4-6,0-6 | |
| French Open Women | 05/23 18:30 | 23 | [135] Katie Volynets v Viktorija Golubic [53] | 6-2,2-6,6-1 | |
| ITF W100 Bonita Springs | 05/07 18:15 | 28 | [234] Gabriela Lee v Katie Volynets [121] | Retired | |
| ITF W100 Bonita Springs | 05/06 14:30 | 27 | [121] Katie Volynets v Alexandra Ignatik [161] | 6-1,7-6 | |
| ITF W100 Bonita Springs | 05/05 16:15 | 26 | [121] Katie Volynets v Caroline Dolehide [173] | 6-2,1-6,7-6 | |
| ITF W100 Bonita Springs | 05/04 18:40 | 25 | [121] Katie Volynets v Tara Moore [400] | 6-1,6-0 | |
| ITF W100 Charleston | 04/29 15:00 | 27 | Taylor Townsend v Katie Volynets | 1-6,6-4,6-2 | |
| ITF W100 Charleston | 04/28 13:50 | 26 | [169] Renata Zarazua v Katie Volynets [121] | 1-6,0-6 | |
| ITF W100 Charleston | 04/27 14:00 | 25 | [404] Chanelle Van Nguyen v Katie Volynets [121] | 2-6,3-6 | |
| ITF W60 Charlottesville | 04/21 18:35 | 26 | Katie Volynets v Taylor Townsend | 4-6,6-3,5-7 | |
| ITF W60 Charlottesville | 04/20 17:05 | 25 | [119] Katie Volynets v Emina Bektas [192] | 6-4,6-1 | |
| ITF W100 Palm Harbor | 04/17 17:45 | 29 | [150] Xiyu Wang v Katie Volynets [154] | 4-6,3-6 | |
| ITF W100 Palm Harbor | 04/16 16:30 | 28 | [110] Irina Maria Bara v Katie Volynets [154] | 3-6,2-6 | |
| ITF W100 Palm Harbor | 04/15 21:30 | 27 | [154] Katie Volynets v Taylor Townsend [483] | 7-5,4-6,6-0 | |
| ITF W100 Palm Harbor | 04/14 21:30 | 26 | [154] Katie Volynets v Kurumi Nara [247] | 6-4,6-4 | |
| ITF W100 Palm Harbor | 04/13 18:15 | 25 | [154] Katie Volynets v Salma Djoubri [415] | 6-1,6-2 | |
| WTA Charleston | 04/05 14:00 | 24 | [64] Magda Linette v Katie Volynets [154] | 4-6,6-3,7-6 | |
| WTA Indian Wells | 03/11 23:30 | 24 | [28] Daria Kasatkina v Katie Volynets [158] | 6-4,4-6,7-5 | |
| WTA Indian Wells | 03/10 01:15 | 23 | [158] Katie Volynets v Arantxa Rus [69] | 4-6,6-4,6-1 | |
| ITF W60 Arcadia | 03/03 18:00 | 26 | [169] Alycia Parks v Katie Volynets [159] | 5-7,6-3,6-3 | |
| ITF W60 Arcadia | 03/01 21:15 | 25 | [285] Lulu Sun v Katie Volynets [159] | 4-6,2-6 | |
| WTA Guadalajara | 02/22 22:00 | 25 | [155] Katie Volynets v Sara Sorribes Tormo [32] | 4-6,1-6 | |
| ITF W60 Rome GA | 02/04 17:50 | 27 | [159] Katie Volynets v Tatjana Maria [311] | 3-6,3-6 | |
| ITF W60 Rome GA | 02/03 20:00 | 26 | [137] Hailey Baptiste v Katie Volynets [159] | 1-6,2-6 | |
| ITF W60 Rome GA | 02/02 16:00 | 25 | [325] Sophie Chang v Katie Volynets [159] | 6-3,3-6,3-6 | |
| Australian Open Women | 01/18 06:50 | 23 | [176] Katie Volynets v Beatriz Haddad Maia [83] | 6-3,2-6,3-6 | |
| Australian Open Women | 01/14 05:20 | 19 | [178] Katie Volynets v Mirjam Bjorklund [219] | 7-5,6-2 | |
| Australian Open Women | 01/12 23:00 | 15 | [245] Andrea Lazaro Garcia v Katie Volynets [178] | 2-6,0-6 |