Round: 25 Ground: Hardcourt outdoor
| ITF - W25 Fort Worth | 2021/09/23 14:00 | Oona Orpana v Emma Navarro | 4-6,2-6 |
| ITF - W25 Fort Worth | 2021/09/22 15:30 | Oona Orpana v Ania Hertel | 6-7,6-4,7-5 |
| ITF - W15 Savitaipale | 2021/07/30 10:20 | Astrid Wanja Brune Olsen v Oona Orpana | 7-6,6-7,7-5 |
| ITF - W15 Savitaipale | 2021/07/29 13:05 | Patricija Spaka v Oona Orpana | 5-7,6-7 |
| ITF - W15 Savitaipale | 2021/07/28 15:35 | Sabastiani Leon v Oona Orpana | 4-6,6-7 |
| ITF - W15 Monastir | 2020/03/12 10:20 | Oona Orpana v Isabella Kruger | 2-6,5-7 |
| ITF - W15 Monastir | 2020/03/11 15:10 | Oona Orpana v Nadia Echeverria Alam | 4-6,7-5,6-2 |
| Fed Cup 2020 | 2020/02/07 14:25 | Mariam Bolkvadze v Oona Orpana | 7-5,6-4 |
| ITF - W15 Monastir | 2021/08/27 07:30 | Jenna Defalco v Hina Inoue | 6-3,6-3 |
| ITF - W15 Monastir | 2021/08/26 14:30 | Hina Inoue v Isabella Kruger | 3-6,6-3,6-4 |
| ITF - W15 Monastir | 2021/08/25 14:30 | Hina Inoue v Asya Colombo | 6-0,6-0 |
| ITF - W15 Monastir | 2021/08/18 16:40 | Hina Inoue v Ayumi Koshiishi | 0-6,1-6 |
| ITF - W25 Evansville | 2021/07/16 16:00 | Hina Inoue v Rebecca Marino | 2-6,1-6 |
| ITF - W25 Evansville | 2021/07/15 14:00 | Adriana Reami v Hina Inoue | 3-6,7-5,5-7 |
| ITF - W25 Evansville | 2021/07/14 18:40 | Amy Zhu v Hina Inoue | 6-2,6-7,2-6 |
| ITF - W15 Prokuplje | 2021/07/06 07:00 | Hina Inoue v Jana Bojovic | 2-6,2-6 |