Stadium: Court 5 Round: 54 Ground: Hardcourt outdoor
| ITF Hong Kong F3 | 2018/12/24 02:00 | Congsup Congcar v Natthasith Kunsuwan | 6-3,7-6 |
| ITF Thailand F5 | 2016/12/17 03:30 | Natthasith Kunsuwan v Congsup Congcar | 7-5,7-6 |
| ITF M25 Nonthaburi | 2019/07/22 02:30 | Dusty H. Boyer v Natthasith Kunsuwan | 6-4,6-3 |
| ITF M25 Nonthaburi | 2019/05/29 04:35 | Natthasith Kunsuwan v Kasidit Samrej | 6-4,3-6,5-7 |
| 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 M25 Nonthaburi | 2019/07/23 07:00 | Congsup Congcar v Yuta Shimizu | 4-6,2-6 |
| ITF M15 Singapore | 2019/06/13 02:00 | Congsup Congcar v Jonathan Gray | 6-4,2-6,3-6 |
| ITF M15 Singapore | 2019/06/04 02:00 | Abhinav Sanjeev Shanmugam v Congsup Congcar | 6-4,6-1 |
| ITF M25 Nonthaburi | 2019/05/31 03:00 | Alexander Crnokrak v Congsup Congcar | 6-0,6-2 |
| ITF M25 Nonthaburi | 2019/05/30 08:00 | Alexander Klintcharov v Congsup Congcar | 1-6,5-7 |
| ITF M25 Nonthaburi | 2019/05/29 05:35 | Congsup Congcar v Wishaya Trongcharoenchaikul | 7-6,7-6 |
| ITF M25 Nonthaburi | 2019/05/23 08:00 | Palaphoom Kovapitukted v Congsup Congcar | 6-2,7-5 |
| ITF M25 Nonthaburi | 2019/05/21 04:50 | Congsup Congcar v Pattanapong Borisutpong | 6-2,6-2 |