Round: 45 Ground: Hardcourt outdoor
| ITF Thailand F9 | 2015/04/19 03:00 | Nagao, Katsuki v Ratiwatana, Sonchat | 6-3,6-3 |
| ITF Thailand F9 | 2015/04/18 04:00 | Ratiwatana, Sonchat v Syed Naguib, Syed Mohd Agil | 6-3,6-1 |
| ITF Japan F4 | 2015/03/29 00:00 | Chaplin, Jarryd v Ratiwatana, Sonchat | 5-7,6-3,6-2 |
| ITF Thailand F9 | 2015/04/19 04:00 | Sidharth Rawat v Ratiwatana, Sanchai | 6-2,6-3 |
| ITF Thailand F9 | 2015/04/18 05:00 | Ratiwatana, Sanchai v Merzuki, Mohd Assri | 6-1,6-1 |
| ITF Japan F4 | 2015/03/29 00:00 | Ratiwatana, Sanchai v Sakai, Yuto | 6-4,3-6,1-6 |