Stadium: Court 8 Round: 25 Ground: Hardcourt outdoor
| ITF - W15 Monastir | 2021/06/28 10:30 | Zafeiri, Nefeli v Paris Corley | 2-6,4-6 |
| ITF - W15 Monastir | 2021/06/27 13:00 | Chahd Berriri v Zafeiri, Nefeli | 1-6,0-6 |
| ITF - W15 Monastir | 2021/06/21 10:30 | Zafeiri, Nefeli v Midori Castillo Meza | 6-2,1-6,5-10 |
| ITF - W15 Monastir | 2021/06/13 14:00 | Zafeiri, Nefeli v Saki Imamura | 1-6,1-6 |
| ITF - W15 Héraklion | 2020/11/22 12:30 | Zafeiri, Nefeli v Hrabalova, Kristyna | 4-6,4-6 |
| ITF - W15 Héraklion | 2020/11/15 08:00 | Zafeiri, Nefeli v Veleva, Beloslava | 1-6,1-6 |
| ITF - W15 Héraklion | 2020/11/08 08:30 | Zafeiri, Nefeli v Eliz Maloney | 1-6,1-6 |
| ITF - W15 Héraklion | 2020/11/02 09:30 | Zafeiri, Nefeli v Crescenzi, Giulia | 1-6,2-6 |
| UTR Pro Tennis Series Florida Women | 2021/06/12 16:00 | Sysoeva, Anastasia v Pisareva, Alexandra | 4-6,6-7 |
| UTR Pro Tennis Series Florida Women | 2021/06/11 17:30 | Sysoeva, Anastasia v Nyjah Head | 6-3,5-3 |
| UTR Pro Tennis Series Florida Women | 2021/06/10 16:00 | Sysoeva, Anastasia v Johanna Silva | 3-6,2-5 |
| UTR Pro Tennis Series Florida Women | 2021/06/09 14:30 | Motosono, Kianah v Sysoeva, Anastasia | 6-7,2-6 |
| UTR Pro Tennis Series Florida Women | 2021/06/08 17:30 | Maria Kononova v Sysoeva, Anastasia | 6-4,2-6,6-3 |
| UTR Pro Tennis Series Florida Women | 2021/06/05 13:30 | Sysoeva, Anastasia v Carolyn Ansari | 2-6,3-6 |
| UTR Pro Tennis Series Florida Women | 2021/06/04 13:30 | Gabriella Broadfoot v Sysoeva, Anastasia | 4-6,5-6 |
| UTR Pro Tennis Series Florida Women | 2021/06/03 14:30 | Pisareva, Alexandra v Sysoeva, Anastasia | 6-2,6-0 |