| Thailand Open | 2018/07/12 08:40 | Kantaphon Wangcharoen v Sitthikom Thammasin | L | 2-0 |
| Thailand Open | 2018/07/11 12:00 | Sitthikom Thammasin v Toby Penty | W | 2-1 |
| Swiss Open WD Qual | 2018/07/10 06:00 | Sitthikom Thammasin v Rahul Yadav Chittaboina | W | 2-0 |
| Swiss Open WD Qual | 2018/07/10 01:52 | Yuehang Wang v Sitthikom Thammasin | W | 0-2 |
| Giraldilla Int. XD | 2018/06/21 21:40 | Junpeng Zhao v Sitthikom Thammasin | L | 2-0 |
| Giraldilla Int. XD | 2018/06/20 19:40 | Sitthikom Thammasin v Kai Schaefer | W | 2-0 |
| US Open | 2018/06/14 00:20 | Sitthikom Thammasin v Mark Caljouw | L | 0-2 |
| Giraldilla Int. XD | 2018/04/05 04:40 | Minoru Koga v Sitthikom Thammasin | L | 2-0 |
| Giraldilla Int. XD | 2018/06/21 21:50 | Max Weisskirchen v Kwang Hee Heo | L | 2-0 |
| Giraldilla Int. XD | 2018/06/20 21:40 | Kwang Hee Heo v Yu Igarashi | W | 2-0 |
| Giraldilla Int. XD | 2018/06/20 01:50 | Kevin Barkman v Kwang Hee Heo | W | 0-2 |
| US Open | 2018/06/16 00:55 | Ajay Jayaram v Kwang Hee Heo | L | 2-0 |
| US Open | 2018/06/15 01:10 | Kwang Hee Heo v Brice Leverdez | W | 2-0 |
| US Open | 2018/06/13 23:00 | Toby Penty v Kwang Hee Heo | W | 1-2 |
| Indonesia Masters XD | 2018/05/23 08:00 | Jonatan Christie v Kwang Hee Heo | W | 0-2 |
| Indonesia Masters XD | 2018/05/21 08:00 | Kwang Hee Heo v Antonio Li | W | 2-0 |