Stadium: Centre Court Round: 24 Ground: Hardcourt outdoor
| 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 |
| Challenger Chennai | 2019/02/04 09:15 | David Perez Sanz v Sumit Nagal | 3-6,2-6 |
| Challenger Launceston | 2019/01/29 23:00 | David Perez Sanz v Go Soeda | 0-6,6-3,2-6 |
| Challenger Launceston | 2019/01/28 04:30 | Jordi Samper-Montana v David Perez Sanz | 3-6,3-6 |
| Challenger Burnie | 2019/01/21 00:20 | Max Purcell v David Perez Sanz | 6-2,6-2 |
| ITF Egypt F28 | 2018/11/25 08:00 | David Perez Sanz v Ryan Nijboer | 6-1,6-1 |
| ITF Egypt F28 | 2018/11/24 08:00 | David Perez Sanz v Adam Moundir | 6-4,7-5 |
| ITF Egypt F28 | 2018/11/23 08:00 | David Perez Sanz v Kacper Zuk | 6-3,6-2 |
| ITF Egypt F28 | 2018/11/22 08:00 | David Perez Sanz v Sagadat Ayap | 6-4,6-1 |