Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2021/10/19 11:05 | Jennifer Luikham v Naoko Eto | 6-3,6-4 |
| ITF W15 Wanfercee-Baulet | 2021/08/23 07:30 | Schena Benamar v Naoko Eto | 6-0,6-2 |
| ITF W15 Erwitte | 2021/08/16 13:30 | Carolin Raschdorf v Naoko Eto | 6-3,6-2 |
| ITF W15 Bratislava | 2021/08/09 10:00 | Naoko Eto v Martina Pradova | 3-6,2-6 |
| ITF W15 Frederiksberg | 2021/08/01 09:00 | Sarafina Olivia Hansen v Naoko Eto | 6-1,7-5 |
| ITF W15 Savitaipale | 2021/07/28 07:00 | Anna Ozerova v Naoko Eto | 6-3,6-2 |
| ITF W15 Monastir | 2021/04/06 11:25 | Naoko Eto v Federica Arcidiacono | 0-6,3-6 |
| ITF W15 Monastir | 2021/04/06 08:00 | Stacey Fung v Naoko Eto | 6-0,6-2 |
| ITF W15 Monastir | 2021/11/01 10:30 | Astrid Lew Yan Foon v Yuna Ohashi | 6-2,6-0 |
| ITF W15 Monastir | 2021/10/31 15:00 | Zhuoma Ni Ma v Astrid Lew Yan Foon | 3-6,3-6 |
| ITF W15 Le Havre | 2021/03/21 13:00 | Astrid Lew Yan Foon v Emmanuelle Girard | 1-6,0-6 |
| ITF W15 Gonesse | 2021/03/14 13:55 | Astrid Lew Yan Foon v Irys Ekani | 4-6,3-6 |