Stadium: Court 13 Round: 25 Ground: Hardcourt outdoor
| Australian Open WC | 2019/12/04 03:35 | Jumpei Yamasaki v Tatsuma Ito | 2-6,2-6 |
| Australian Open WC | 2019/12/03 03:00 | Jumpei Yamasaki v Rhett Purcell | 4-6,7-5,6-3 |
| ITF M15 Nonthaburi | 2019/11/27 04:50 | Jumpei Yamasaki v Benjamin Pietri | 4-6,6-3,2-6 |
| Challenger Kobe | 2019/11/05 01:30 | Jumpei Yamasaki v Ramkumar Ramanathan | 4-6,1-6 |
| ITF M25 Tay Ninh | 2019/10/09 02:00 | Jumpei Yamasaki v Christian Didier Chin | 6-2,6-0 |
| ITF M25 Tay Ninh | 2019/10/02 03:30 | Rimpei Kawakami v Jumpei Yamasaki | 6-1,6-3 |
| Challenger Kaohsiung | 2019/09/17 01:30 | Jumpei Yamasaki v Luke Saville | 6-7,4-6 |
| Challenger Kaohsiung | 2019/09/16 01:30 | Jumpei Yamasaki v Chang-Lin Tsai | 6-3,6-1 |
| ITF M15 Nanchang | 2019/09/30 02:00 | Wai Yu Kai v Linang Xiao | 2-6,6-3,8-10 |
| ITF M15 Nanchang | 2019/09/29 04:00 | Hanyi Liu v Wai Yu Kai | 4-6,4-6 |
| Davis Cup | 2019/09/15 04:45 | Wai Yu Kai v Chun Hsin Tseng | 2-6,5-7 |
| ITF M25 Hengyang | 2019/06/17 04:15 | Martin Borisiouk v Wai Yu Kai | 3-6,7-5,10-8 |
| ITF M25 Hong Kong | 2019/06/12 06:25 | Alexander Crnokrak v Wai Yu Kai | 6-3,6-1 |
| ITF M25 Hong Kong | 2019/06/04 05:25 | Shuichi Sekiguchi v Wai Yu Kai | 6-2,6-1 |
| ITF M15 Wuhan | 2019/04/29 03:45 | Wai Yu Kai v Kousuke Ogura | 3-6,4-6 |
| ITF Hong Kong F3 | 2018/12/22 02:00 | Xin Gao v Wai Yu Kai | 6-3,6-2 |