Stadium: Court 1 Round: 26 Ground: Hardcourt indoor
| Challenger Rennes MD | 2021/09/14 14:30 | Matsui/Uesugi v Kadhe/Schnur | 1-6,6-7 |
| Challenger Cassis MD | 2021/09/10 08:30 | Matsui/Uesugi v Verdugo/Reyes-Varela | 6-3,6-7,7-10 |
| Challenger Cassis MD | 2021/09/09 10:35 | Cornea/Tsitsipas v Matsui/Uesugi | 7-5,4-6,8-10 |
| Challenger Cassis MD | 2021/09/08 11:35 | Matsui/Uesugi v Nedunchezhiyan/Raja | 7-5,6-1 |
| Challenger Mallorca MD | 2021/09/01 19:20 | Matsui/Uesugi v Romboli/Zielinski | 7-5,6-7,10-12 |
| Challenger Fergana MD | 2019/06/19 10:55 | Matsui/Uesugi v Fayziev/Sultanov | 6-7,5-7 |
| ITF M25 Hong Kong MD | 2019/06/11 05:00 | Duncan/Lazdins v Matsui/Uesugi | 3-6,0-0 |
| Challenger Yokohama MD | 2019/03/01 07:20 | Matsui/Uesugi v Chung/Kwon | 6-3,5-7,4-10 |