Stadium: Court 4 Round: 54 Ground: Clay
| ITF Women Irapuato | 2017/04/14 20:30 | Katie Swan v Marcela Zacarias | 6-1,6-7,6-2 |
| ITF W25 Naples | 2021/05/05 18:35 | Kayla Day v Katie Swan | 6-3,3-6,6-4 |
| ITF W60 Charlottesville | 2021/04/26 16:05 | Katie Swan v Panna Udvardy | 5-7,3-6 |
| ITF W25 Orlando | 2021/02/21 15:55 | Robin Anderson v Katie Swan | 1-6,3-6 |
| ITF W25 Orlando | 2021/02/20 16:40 | Renata Zarazua v Katie Swan | 5-7,6-7 |
| ITF W25 Orlando | 2021/02/19 15:00 | Katie Volynets v Katie Swan | 1-6,1-6 |
| ITF W25 Orlando | 2021/02/18 15:00 | Katie Swan v Gabriela Talaba | 3-6,6-3,6-2 |
| ITF W25 Orlando | 2021/02/17 21:00 | Kayla Day v Katie Swan | 3-6,3-6 |
| ITF W60 Rome GA | 2021/01/27 16:55 | Katie Swan v Usue Maitane Arconada | 6-3,3-6,3-6 |
| UTR Pro Tennis Series California Women | 2021/05/09 15:00 | Marcela Zacarias v Veronika Miroshnichenko | 6-3,5-1 |
| UTR Pro Tennis Series California Women | 2021/05/08 15:00 | Marcela Zacarias v Dalayna Hewitt | 7-6,6-4 |
| UTR Pro Tennis Series California Women | 2021/05/07 16:30 | Marcela Zacarias v Kaia Wolfe | 6-0,6-1 |
| UTR Pro Tennis Series California Women | 2021/05/06 19:15 | Marcela Zacarias v Taylor Cataldi | 6-0,5-3 |
| UTR Pro Tennis Series California Women | 2021/05/05 16:30 | Makenna Thiel v Marcela Zacarias | 1-6,0-6 |
| UTR Pro Tennis Series California Women | 2021/05/04 19:30 | Leyden Games v Marcela Zacarias | 1-6,6-6 |
| Billie Jean King Cup | 2021/04/17 10:30 | Heather Watson v Marcela Zacarias | 3-6,6-7 |
| Billie Jean King Cup | 2021/04/16 12:45 | Katie Boulter v Marcela Zacarias | 7-5,6-0 |