| UTR Pro Tennis Series California Women | 2021/07/04 15:00 | 자카리아스, 마르셀라 v Eryn Cayetano | 6-4,6-3 |
| UTR Pro Tennis Series California Women | 2021/07/03 15:00 | 자카리아스, 마르셀라 v Ava Markham | 6-3,7-6 |
| UTR Pro Tennis Series California Women | 2021/07/01 16:30 | 자카리아스, 마르셀라 v 존슨, 타일러 | 6-0,5-2 |
| UTR Pro Tennis Series California Women | 2021/06/30 15:00 | Veronika Miroshnichenko v 자카리아스, 마르셀라 | 5-7,6-2,1-5 |
| UTR Pro Tennis Series California Women | 2021/06/29 15:00 | Emma Sun v 자카리아스, 마르셀라 | 0-6,0-6 |
| UTR Pro Tennis Series California Women | 2021/06/28 21:00 | Kami Osher v 자카리아스, 마르셀라 | 3-6,0-6 |
| ITF W60 Charleston | 2021/06/23 16:40 | 치리코, 로우이사 v 자카리아스, 마르셀라 | 6-1,7-5 |
| ITF W25 Sumter | 2021/06/19 14:00 | 자카리아스, 마르셀라 v 스테아른스, 페이톤 | 3-6,6-2,2-6 |
| UTR Pro Tennis Series Nevada Women | 2021/05/23 16:30 | Daria Smetannikov v Kendall Kovick | 6-2,4-6,6-4 |
| UTR Pro Tennis Series Nevada Women | 2021/05/22 19:30 | Daria Smetannikov v Mia Slama | 6-2,5-0 |
| UTR Pro Tennis Series Nevada Women | 2021/05/20 18:15 | Daria Smetannikov v Miruna Vasilescu | 3-6,3-5 |
| UTR Pro Tennis Series Nevada Women | 2021/05/19 18:00 | Daria Smetannikov v Stephanie Schrage | 6-4,5-2 |
| UTR Pro Tennis Series Nevada Women | 2021/05/18 16:30 | Daria Smetannikov v Pisareva, Alexandra | 3-6,3-6 |
| UTR Pro Tennis Series Nevada Women | 2021/05/17 19:30 | Daria Smetannikov v Alexia Harmon | 6-3,4-6,1-5 |
| UTR Pro Tennis Series Atlanta Women | 2021/04/04 14:30 | Daria Smetannikov v Priya Nelson | 6-2,6-2 |
| UTR Pro Tennis Series Atlanta Women | 2021/04/02 15:30 | Daria Smetannikov v 킹슬레이, 라비에나 | 1-6,4-6 |