Stadium: Court 8 Round: 25 Ground: Hardcourt outdoor
| ITF Thailand F7 Qual | 2017/09/30 02:30 | Natthasith Kunsuwan v Kasidit Samrej | 7-6,6-0 |
| ITF M25 Hong Kong | 2019/01/01 03:35 | Kuan-Yi Lee v Natthasith Kunsuwan | 6-2,6-3 |
| ITF Hong Kong F3 | 2018/12/24 02:00 | Congsup Congcar v Natthasith Kunsuwan | 6-3,7-6 |
| ITF Thailand F9 | 2018/11/12 04:30 | Natthasith Kunsuwan v Robert Strombachs | 2-6,0-6 |
| ITF Thailand F8 | 2018/11/03 06:00 | Yeongseok Jeong v Natthasith Kunsuwan | 6-2,4-6,6-4 |
| Challenger Shenzhen 2 | 2018/10/27 07:30 | Saketh Myneni v Natthasith Kunsuwan | 6-4,7-5 |
| ITF Thailand F6 | 2018/10/08 02:30 | Natthasith Kunsuwan v Daisuke Sumizawa | 2-6,2-6 |
| ITF Thailand F6 | 2018/10/06 05:30 | Natthasith Kunsuwan v Daniel Kossek | 6-4,6-7,6-4 |
| ITF Thailand F5 | 2018/09/30 02:30 | Seung-Hun Shin v Natthasith Kunsuwan | 7-6,6-1 |
| ITF Thailand F3 | 2018/09/02 02:00 | Kasidit Samrej v Ren Nakamura | 4-6,5-7 |
| Challenger Bangkok Qual | 2017/12/31 03:00 | Cem Ilkel v Kasidit Samrej | 6-4,6-4 |
| Challenger Bangkok Qual | 2017/12/30 03:00 | Tanakorn Srirat v Kasidit Samrej | 4-6,1-6 |
| ITF Thailand F7 Qual | 2017/09/30 02:30 | Natthasith Kunsuwan v Kasidit Samrej | 7-6,6-0 |
| ITF Thailand F6 Qual | 2017/08/12 04:30 | Li-Wei Tan v Kasidit Samrej | 6-3,6-3 |
| ITF Thailand F1 | 2017/06/03 06:00 | Kasidit Samrej v Arjun Mariyappa | 6-0,6-2 |
| ITF Thailand F5 | 2016/12/17 03:30 | Oleg Kurbatov v Kasidit Samrej | 6-4,6-0 |
| ITF Thailand F2 | 2016/08/27 06:25 | Joan Soler v Kasidit Samrej | 6-0,6-0 |