 Portugal: W15 Lousada - Doubles - Main |
|---|
| 1/8-finals | Koshiishi A./Sakatsume H. | Bulgaru M./Szabanin N. | 0:2 (5:7, 4:6) | details | 24.11.2021 |
| Portugal: W25 Funchal - Doubles - Main |
|---|
| 1/8-finals | Murta I./Vismane D. | Koshiishi A./Sakatsume H. | 2:0 (6:3, 6:2) | details | 16.11.2021 |
 Tunisia: W15 Monastir 18 - Doubles - Main |
|---|
| 1/8-finals | Hosogi S./Sema E. | Koshiishi A./Sakatsume H. | 2:0 (6:4, 6:4) | details | 18.05.2021 |
| Tunisia: W15 Monastir 17 - Doubles - Main |
|---|
| Semi-finals | Proctor L./Ulyashchenko A. | Koshiishi A./Sakatsume H. | 2:0 (6:1, 6:4) | details | 14.05.2021 |
| Quarter-finals | Gram O./Perez Garcia M. P. | Koshiishi A./Sakatsume H. | WO. | details | 13.05.2021 |
| 1/8-finals | Koshiishi A./Sakatsume H. | Hosogi S./Sukhotina A. | 2:0 (6:1, 6:3) | details | 12.05.2021 |
| Tunisia: W15 Monastir 16 - Doubles - Main |
|---|
| Quarter-finals | Raggi A./Scholl C. | Koshiishi A./Sakatsume H. | 2:1 (2:6, 6:4, 11:9) | details | 06.05.2021 |
| 1/8-finals | Koshiishi A./Sakatsume H. | Le Bihan K./Noel M. | 2:0 (6:4, 7:5) | details | 05.05.2021 |
| Tunisia: W15 Monastir 15 - Doubles - Main |
|---|
| 1/8-finals | Le Bihan K./Noel M. | Koshiishi A./Sakatsume H. | 2:0 (6:2, 6:4) | details | 28.04.2021 |
 Turkey: W15 Antalya 7 - Doubles - Main |
|---|
| Quarter-finals | Koshiishi A./Sakatsume H. | Herazo Gonzalez M./Lizarazo Y. | 1:2 (1:6, 7:5, 6:10) | details | 19.02.2021 |
| 1/8-finals | Koshiishi A./Sakatsume H. | Astakhova D./Ekshibarova V. | 2:0 (7:5, 6:4) | details | 17.02.2021 |
| Turkey: W15 Antalya 6 - Doubles - Main |
|---|
| 1/8-finals | Bosio V./Gamarra Martins I. | Koshiishi A./Sakatsume H. | 2:0 (6:1, 6:2) | details | 09.02.2021 |
| Turkey: W15 Antalya 5 - Doubles - Main |
|---|
| 1/8-finals | Arshinkova P./Topalova G. | Koshiishi A./Sakatsume H. | 2:0 (6:2, 7:63) | details | 04.02.2021 |
