| Califórnia - UTR Pro Tennis Series - Feminino | 2021/06/13 15:00 | Vivian Ovrootsky v Zoe Hammond | 6-3,6-1 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/05/06 15:00 | Zoe Hammond v Veronika Miroshnichenko | 0-6,0-1 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/05/05 18:00 | Zoe Hammond v Jwany Sherif | 6-4,0-6,4-5 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/05/04 18:00 | Zoe Hammond v Aanya Goel | 1-6,3-5 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/05/03 15:00 | Zoe Hammond v Megan Heuser | 7-6,2-6,6-6 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/05/01 16:30 | Zoe Hammond v Marley Lambert | 6-1,6-3 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/04/30 19:30 | Zoe Hammond v Sankavi Gownder | 1-6,2-5 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/04/28 21:30 | Zoe Hammond v Dalayna Hewitt | 4-6,4-5 |
| Califórnia - UTR Pro Tennis Series - Feminino | 2021/06/13 19:30 | Klara Kosan v Kelly Keller | 3-6,6-6 |
| UTR Pro Tennis Series - Nevada - Feminino | 2021/05/22 19:30 | Klara Kosan v Kendall Kovick | 5-7,6-4,3-6 |
| UTR Pro Tennis Series - Nevada - Feminino | 2021/05/21 18:30 | Elizaveta Volodko v Klara Kosan | 6-4,7-5 |
| UTR Pro Tennis Series - Nevada - Feminino | 2021/05/20 16:30 | Jeanette Mireles v Klara Kosan | 6-4,0-6,2-6 |
| UTR Pro Tennis Series - Nevada - Feminino | 2021/05/19 18:00 | Camille Kiss v Klara Kosan | 7-5,6-5 |
| UTR Pro Tennis Series - Nevada - Feminino | 2021/05/17 18:00 | Karolina Jacobson v Klara Kosan | 6-4,6-6 |
| ITF - W60 Templeton | 2019/09/25 22:05 | Klara Kosan v Elysia Bolton | 1-6,5-7 |
| ITF W15 Arcadia | 2019/03/11 14:00 | Klara Kosan v Christina Shakovets | 3-6,2-6 |