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 Nonthaburi | 2019/05/28 04:40 | Natthasith Kunsuwan v Michael Mat'chand | 6-4,6-3 |
| ITF M25 Nonthaburi | 2019/05/22 03:00 | Natthasith Kunsuwan v Jayden Court | 7-5,3-6,6-7 |
| ITF M25 Luan | 2019/05/15 07:40 | Rimpei Kawakami v Natthasith Kunsuwan | 6-4,6-1 |
| ITF M25 Luan | 2019/05/14 03:25 | Natthasith Kunsuwan v Guan Kai Wang | 6-0,6-0 |
| ITF M25 Luan | 2019/05/13 03:10 | Natthasith Kunsuwan v Zijiang Yang | 6-2,6-2 |
| ITF M25 Wuhan | 2019/05/06 07:05 | Karunuday Singh v Natthasith Kunsuwan | 6-4,6-2 |
| ITF M15 Wuhan | 2019/04/30 03:20 | Natthasith Kunsuwan v Pak Long Yeung | 5-7,2-6 |
| ITF M15 Wuhan | 2019/04/29 07:05 | Natthasith Kunsuwan v Yaojie Zeng | 7-6,6-3 |
| ITF M25 Nonthaburi | 2019/05/28 04:45 | Phongsapak Kerdlaphee v Kasidit Samrej | 3-6,3-6 |
| ITF M25 Nonthaburi | 2019/05/27 07:30 | Kasidit Samrej v Tonkla Mulada | 6-0,6-0 |
| ITF M25 Nonthaburi | 2019/05/21 06:35 | Kasidit Samrej v Harry Bourchier | 3-6,6-7 |
| 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 |