| Open de Malaisie | 2019/04/04 08:40 | Thammasin, S. v Kanta Tsuneyama | L | 1-2 |
| New Zealand Open 2019, MS | 2019/05/01 05:20 | Huang, Y. X. v Thammasin, S. | W | 0-2 |
| New Zealand Open 2019, MS | 2019/04/30 20:00 | Huang, Y. X. v Thammasin, S. | W | 0-2 |
| Asia Championships | 2019/04/25 08:00 | Thammasin, S. v Shi, Y. Q. | L | 0-2 |
| Asia Championships | 2019/04/24 10:40 | June Wei Cheam v Thammasin, S. | W | 1-2 |
| Singapore Open | 2019/04/10 10:00 | Srikanth Kidambi v Thammasin, S. | L | 2-0 |
| Singapore Open 2019, MS, Qualification | 2019/04/09 05:30 | Thammasin, S. v Cheuk Yiu Lee | W | 2-1 |
| Singapore Open 2019, MS, Qualification | 2019/04/09 03:10 | Mustofa, Ihsan Maulana v Thammasin, S. | W | 0-2 |
| Open de Malaisie | 2019/04/04 08:40 | Thammasin, S. v Kanta Tsuneyama | L | 1-2 |
| New Zealand Open 2019, MS | 2019/05/01 04:40 | Igarashi, Yu v Kanta Tsuneyama | W | 0-2 |
| New Zealand Open 2019, MS | 2019/04/30 20:00 | Igarashi, Yu v Kanta Tsuneyama | W | 0-2 |
| Asia Championships | 2019/04/24 08:00 | Chen, Long v Kanta Tsuneyama | L | 2-0 |
| Singapore Open | 2019/04/10 09:20 | Hans-Kristian Vittinghus v Kanta Tsuneyama | L | 2-1 |
| Open de Malaisie | 2019/04/05 09:40 | Kanta Tsuneyama v Lin, Dan | L | 1-2 |
| Open de Malaisie | 2019/04/04 08:40 | Thammasin, S. v Kanta Tsuneyama | W | 1-2 |
| Open de Malaisie | 2019/04/03 06:00 | Kanta Tsuneyama v Chong, Wei Feng | W | 2-0 |
| Tong Yun Kai Cup | 2019/03/24 06:30 | Kanta Tsuneyama v Lu, G. Z. | W | 2-0 |