| Setka Cup Women | 2021/11/05 19:00 | Anastasiia Ostapenko v Kozak, Anastasiya | W | 3-2 |
| Setka Cup Women | 2021/11/05 16:30 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-0 |
| Setka Cup Women | 2021/10/20 07:30 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-1 |
| Setka Cup Women | 2021/09/24 07:40 | Anastasiia Ostapenko v Kozak, Anastasiya | L | 2-3 |
| Setka Cup Women | 2021/09/22 14:30 | Kozak, Anastasiya v Anastasiia Ostapenko | W | 2-3 |
| Setka Cup Women | 2021/09/06 05:50 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-1 |
| Setka Cup Women | 2021/09/05 14:30 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-1 |
| Others | 2021/08/31 10:12 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-1 |
| Setka Cup Women | 2021/11/06 14:30 | Anastasiia Ostapenko v Alina Man | W | 3-0 |
| Setka Cup Women | 2021/11/06 13:30 | Anastasiia Ostapenko v Anastasiia Moskaliuk | L | 0-3 |
| Setka Cup Women | 2021/11/05 19:00 | Anastasiia Ostapenko v Kozak, Anastasiya | W | 3-2 |
| Setka Cup Women | 2021/11/05 17:30 | Anastasiia Ostapenko v Alina Man | W | 3-0 |
| Setka Cup Women | 2021/11/05 16:30 | Kozak, Anastasiya v Anastasiia Ostapenko | L | 3-0 |
| Setka Cup Women | 2021/11/05 15:30 | Dubrova, A. v Anastasiia Ostapenko | W | 1-3 |
| Setka Cup Women | 2021/11/05 14:00 | Svydnytska, Nataliia v Anastasiia Ostapenko | W | 2-3 |
| Setka Cup Women | 2021/11/03 13:25 | Alina Man v Anastasiia Ostapenko | L | 3-2 |
| Setka Cup Women | 2021/11/06 15:00 | Kozak, Anastasiya v Anastasiia Moskaliuk | L | 1-3 |
| Setka Cup Women | 2021/11/06 14:00 | Kozak, Anastasiya v Alina Man | W | 3-2 |
| Setka Cup Women | 2021/11/05 19:00 | Anastasiia Ostapenko v Kozak, Anastasiya | L | 3-2 |
| Setka Cup Women | 2021/11/05 18:00 | Dubrova, A. v Kozak, Anastasiya | W | 0-3 |
| Setka Cup Women | 2021/11/05 16:30 | Kozak, Anastasiya v Anastasiia Ostapenko | W | 3-0 |
| Setka Cup Women | 2021/11/05 15:00 | Kozak, Anastasiya v Svydnytska, Nataliia | L | 2-3 |
| Setka Cup Women | 2021/11/05 13:30 | Kozak, Anastasiya v Alina Man | W | 3-0 |
| Setka Cup Women | 2021/10/31 10:54 | Yureneva, Olga v Kozak, Anastasiya | W | 0-3 |