Stadium: Court 1 Round: 25 Ground: Clay
| ITF W25 Orlando | 2021/11/03 20:05 | Allie Kiick v Katerina Stewart | 6-1,3-6,6-1 |
| ITF W15 Hilton Head | 2021/10/10 18:00 | Raveena Kingsley v Katerina Stewart | 4-6,2-6 |
| ITF W15 Hilton Head | 2021/10/10 14:00 | Ania Hertel v Katerina Stewart | 4-6,6-7 |
| ITF W15 Hilton Head | 2021/10/09 16:15 | Deniza Marcinkevica v Katerina Stewart | 4-6,1-6 |
| ITF W15 Hilton Head | 2021/10/09 13:00 | Mckenna Schaefbauer v Katerina Stewart | 0-6,6-4,3-10 |
| ITF W15 Hilton Head | 2021/10/05 19:20 | Lena Lutzeier v Katerina Stewart | 1-6,1-6 |
| WTA Cluj-Napoca | 2021/08/01 14:10 | Katerina Stewart v Irina Fetecau | 1-6,5-7 |
| ITF W60 Versmold | 2021/07/28 11:00 | Katerina Stewart v Elina Avanesyan | 6-7,4-6 |
| WTA Midland | 2021/10/31 18:55 | Ivana Popovic v Sophie Chang | 4-6,6-3,3-6 |
| ITF W25 Austin | 2021/10/29 18:00 | Fernanda Contreras Gomez v Ivana Popovic | 2-6,7-6,6-2 |
| ITF W25 Austin | 2021/10/28 18:50 | Ivana Popovic v Danielle Lao | 5-7,6-2,6-3 |
| ITF W25 Austin | 2021/10/27 17:35 | Ivana Popovic v Ena Shibahara | 6-0,6-3 |
| ITF W80 Macon | 2021/10/18 16:55 | Alycia Parks v Ivana Popovic | 6-4,6-1 |
| ITF W60 Berkeley | 2021/09/28 18:50 | Ivana Popovic v Maria Kozyreva | 3-6,4-6 |
| ITF W25 Fort Worth | 2021/09/23 14:00 | Emiliana Arango v Ivana Popovic | 5-7,7-5,6-2 |
| ITF W25 Fort Worth | 2021/09/22 18:25 | Charlotte Chavatipon v Ivana Popovic | 2-6,6-3,3-6 |