| Taipei Open | 07/21 04:40 | - | Chun-Yi Lin v Namkul, Adulrach | L | 2-1 | |
| Taipei Open | 07/20 08:30 | 5 | Namkul, Adulrach v Misha Zilberman | W | 2-1 | |
| Nantes Int. | 06/24 09:40 | - | Namkul, Adulrach v Toby Penty | L | 0-2 | |
| Denmark Masters | 06/10 08:20 | - | Namkul, Adulrach v Yeoh, Seng Zoe | L | 1-2 | |
| Italian Int. Qual | 06/02 07:55 | - | Namkul, Adulrach v Gustav Bjorkler | W | 2-0 | |
| Thomas Cup | 05/11 07:40 | - | Namkul, Adulrach v Jia Heng Jason Teh | W | 2-1 | |
| Asia Championships | 04/27 10:20 | 5 | Namkul, Adulrach v Kenta Nishimoto | L | 1-2 | |
| Syed Modi Int. | 01/20 09:50 | 4 | Namkul, Adulrach v Nhat Nguyen | L | 0-2 | |
| Syed Modi Int. | 01/19 08:40 | 5 | Namkul, Adulrach v Tze Yong Ng | - | Walkover | |
| Czech Open | 10/22 08:20 | - | Tze Yong Ng v Namkul, Adulrach | L | 2-0 | |
| Thomas Cup | 10/15 07:50 | - | Namkul, Adulrach v Hong Yang Weng | - | Cancelled | |
| Thomas Cup | 10/13 12:10 | - | Namkul, Adulrach v Adel Hamek | W | 2-0 | |
| Thomas Cup | 10/11 12:50 | - | Shesar Hiren Rhustavito v Namkul, Adulrach | L | 2-1 | |
| Thailand Masters Qual | 01/21 03:00 | - | Lu, C. H. v Namkul, Adulrach | L | 2-0 | |
| Vietnam Open | 09/11 05:10 | 6 | Soo, Teck Zhi v Namkul, Adulrach | L | 2-1 | |
| Hyderabad Open 2019, MS | 08/07 10:50 | 5 | Namkul, Adulrach v Verma, Sourabh | L | 0-2 | |
| Hyderabad Open 2019, MS | 08/06 14:10 | 6 | Thongnuam, Pannawit v Namkul, Adulrach | W | 0-2 | |
| Open de Thaïlande - Qualif. | 07/30 03:55 | - | June Wei Cheam v Namkul, Adulrach | L | 2-0 | |
| Vietnam Int. | 04/09 10:40 | - | Namkul, Adulrach v Duc Phat Le | L | 0-2 | |
| Open de Suisse - Doubles Femmes - Qualif. | 01/08 02:00 | 1 | Kan, C Y v Namkul, Adulrach | W | 0-2 | |
| Macau Open 2019, MS | 10/31 01:50 | 5 | Namkul, Adulrach v Takeshita, Riichi | L | 1-2 | |
| Open de Suisse - Doubles Femmes - Qualif. | 09/19 02:00 | 6 | Febriansyah, Muhammad v Namkul, Adulrach | L | 2-1 | |
| Giraldilla Int. XD | 08/09 09:45 | 4 | Mithun Manjunath v Namkul, Adulrach | L | 2-1 | |
| Giraldilla Int. XD | 08/08 14:55 | 5 | Namkul, Adulrach v Marteen, Andre | W | 2-1 | |
| Giraldilla Int. XD | 08/07 13:30 | 6 | Namkul, Adulrach v Joshi, Bodhit | W | 2-0 | |
| Giraldilla Int. XD | 07/24 02:40 | 6 | Shih, K. C. v Namkul, Adulrach | L | 2-1 | |
| Open de Suisse - Doubles Femmes - Qualif. | 07/17 01:50 | - | Namkul, Adulrach v Kean Yew Loh | L | 1-2 | |
| Open de Suisse - Doubles Femmes - Qualif. | 07/10 02:00 | 1 | Lu, G. Z. v Namkul, Adulrach | L | 2-0 | |
| Giraldilla Int. XD | 02/21 16:50 | 5 | Joo Ven Soong v Namkul, Adulrach | L | 2-0 | |
| Giraldilla Int. XD | 01/10 10:15 | 5 | Wei, Nan v Namkul, Adulrach | L | 2-0 |