Stadium: Court 4 Round: 25 Ground: Clay
| ITF W15 Antalya | 2021/05/12 08:40 | Caijsa W Hennemann v Natalia Siedliska | 7-5,7-5 |
| ITF W15 Antalya | 2021/05/04 09:10 | Natalia Siedliska v Ekaterina Shalimova | 6-4,0-6,5-7 |
| ITF W15 Kairo | 2021/04/28 08:00 | Zoe Kruger v Natalia Siedliska | 6-3,6-4 |
| ITF W15 Sharm El Sheikh | 2021/03/31 07:00 | Ya-Hsuan Lee v Natalia Siedliska | 6-3,6-2 |
| ITF W15 Sharm El Sheikh | 2021/03/24 09:00 | Elena-Teodora Cadar v Natalia Siedliska | 6-3,6-2 |
| UTR Pro Tennis Series – Prantsusmaa – naised | 2020/09/14 14:30 | Natalia Siedliska v Darya Astakhova | 6-1,2-6,5-10 |
| UTR Pro Tennis Series – Prantsusmaa – naised | 2020/09/12 12:00 | Natalia Siedliska v Anna Morgina | 6-1,6-1 |
| UTR Pro Tennis Series – Prantsusmaa – naised | 2020/09/12 07:00 | Natalia Siedliska v Gaelle Desperrier | 3-6,4-6 |
| ITF W15 Antalya | 2021/05/18 07:00 | Mayuka Aikawa v Nina Alibalic | 6-1,6-1 |
| ITF W15 Antalya | 2021/05/17 07:00 | Mayuka Aikawa v Melis Ayda Uyar | 6-2,6-1 |
| ITF W15 Antalya | 2021/05/12 07:00 | Gabriela Ce v Mayuka Aikawa | 6-2,6-2 |
| ITF W15 Antalya | 2021/05/11 07:00 | Mayuka Aikawa v Ozlem Uslu | 2-6,6-3,10-8 |
| ITF W15 Antalya | 2021/05/10 07:00 | Mayuka Aikawa v Beatrice Ricci | 6-3,6-1 |
| ITF W15 Antalya | 2021/05/09 07:00 | Mayuka Aikawa v Julia Keranovic | 6-1,6-1 |
| ITF W15 Antalya | 2021/05/04 10:00 | Andreea Amalia Rosca v Mayuka Aikawa | 6-4,6-2 |
| ITF W15 Antalya | 2021/04/27 07:00 | Mayuka Aikawa v Tamira Paszek | 5-7,3-6 |