Stadium: Court 13 Round: 25 Ground: Clay
| ITF - W15 Monastir | 2021/08/27 09:30 | Riko Sawayanagi v Moyuka Uchijima | 1-6,2-6 |
| ITF - W15 Monastir | 2021/08/26 09:10 | Ramu Ueda v Riko Sawayanagi | 2-6,6-2,3-6 |
| ITF - W15 Monastir | 2021/08/25 16:45 | Riko Sawayanagi v Maria Vittoria Viviani | 6-4,6-4 |
| ITF - W15 Monastir | 2021/08/24 08:30 | Riko Sawayanagi v Emma Van Poppel | 6-4,6-0 |
| ITF - W15 Monastir | 2021/08/16 16:00 | Riko Sawayanagi v Aglaya Fedorova | 7-5,0-6,6-10 |
| ITF - W15 Antalya | 2021/06/16 10:20 | Riko Sawayanagi v Jessie Aney | 5-7,1-6 |
| ITF - W15 Antalya | 2021/06/15 07:30 | Riko Sawayanagi v Linda Sevcikova | 6-4,6-2 |
| ITF - W15 Antalya | 2021/06/14 07:30 | Riko Sawayanagi v Mia Mack | 6-0,6-0 |
| ITF - W15 Cairo | 2021/08/30 08:00 | Minami Akiyama v Miho Kuramochi | 0-6,2-6 |
| ITF - W15 Cairo | 2021/08/29 08:00 | Anna Grigoreva v Miho Kuramochi | 0-6,2-6 |