| Thailand Open | 05/31 10:20 | 5 | Sitthikom Thammasin v Jun Hao Leong | L | 1-2 | |
| Malaysia Masters | 05/24 02:55 | 5 | Sitthikom Thammasin v Magnus Johannesen | L | 1-2 | |
| SEA Games | 05/08 05:30 | - | Vannthoun Vath v Sitthikom Thammasin | W | 0-2 | |
| Orleans Masters | 04/05 10:50 | 5 | Jan Louda v Sitthikom Thammasin | L | 2-0 | |
| Spain Masters | 03/29 10:20 | 5 | Srikanth Kidambi v Sitthikom Thammasin | L | 2-1 | |
| Swiss Open | 03/22 13:40 | 5 | Sitthikom Thammasin v Koki Watanabe | L | 0-2 | |
| All England Open | 03/15 10:00 | 5 | Sitthikom Thammasin v Lee Zii Jia | L | 0-2 | |
| Thailand Masters | 02/01 06:40 | 5 | Thammasin Sitthikom v Anders Antonsen | L | 0-2 | |
| Indonesia Masters | 01/25 01:20 | 5 | Sitthikom Thammasin v Guang Zu Lu | L | 1-2 | |
| Australian Open | 11/16 02:40 | 5 | Koki Watanabe v Sitthikom Thammasin | L | 2-0 | |
| Hylo Open | 11/01 14:50 | 5 | Sitthikom Thammasin v Daren Liew | L | 0-2 | |
| French Open | 10/27 11:40 | 4 | Viktor Axelsen v Sitthikom Thammasin | L | 2-0 |