| Malaysia Open | 2019/04/04 08:40 | Sitthikom Thammasin v Kanta Tsuneyama | L | 1-2 |
| New Zealand Open | 2019/05/01 05:20 | Yuxiang Huang v Sitthikom Thammasin | W | 0-2 |
| New Zealand Open | 2019/04/30 20:00 | Yuxiang Huang v Sitthikom Thammasin | W | 0-2 |
| Asia Championships | 2019/04/25 08:00 | Sitthikom Thammasin v Yuqi Shi | L | 0-2 |
| Asia Championships | 2019/04/24 10:40 | June Wei Cheam v Sitthikom Thammasin | W | 1-2 |
| Singapore Open | 2019/04/10 10:00 | Srikanth Kidambi v Sitthikom Thammasin | L | 2-0 |
| Singapore Open Qual | 2019/04/09 05:30 | Sitthikom Thammasin v Cheuk Yiu Lee | W | 2-1 |
| Singapore Open Qual | 2019/04/09 03:10 | Ihsan Maulana Mustofa v Sitthikom Thammasin | W | 0-2 |
| Malaysia Open | 2019/04/04 08:40 | Sitthikom Thammasin v Kanta Tsuneyama | L | 1-2 |
| New Zealand Open | 2019/05/01 04:40 | Yu Igarashi v Kanta Tsuneyama | W | 0-2 |
| New Zealand Open | 2019/04/30 20:00 | Yu Igarashi v Kanta Tsuneyama | W | 0-2 |
| Asia Championships | 2019/04/24 08:00 | Long Chen v Kanta Tsuneyama | L | 2-0 |
| Singapore Open | 2019/04/10 09:20 | Hans-Kristian Vittinghus v Kanta Tsuneyama | L | 2-1 |
| Malaysia Open | 2019/04/05 09:40 | Kanta Tsuneyama v Dan Lin | L | 1-2 |
| Malaysia Open | 2019/04/04 08:40 | Sitthikom Thammasin v Kanta Tsuneyama | W | 1-2 |
| Malaysia Open | 2019/04/03 06:00 | Kanta Tsuneyama v Wei Feng Chong | W | 2-0 |
| Tong Yun Kai Cup | 2019/03/24 06:30 | Kanta Tsuneyama v Guangzu Lu | W | 2-0 |