Stadium: Ct 4 Round: 25 Ground: Hardcourt outdoor
| Davis Cup | 2018/04/04 11:50 | Colin Sinclair v Christian Didier Chin | 3-6,2-6 |
| ITF Thailand F12 | 2017/12/12 10:00 | Colin Sinclair v Daniel Altmaier | 3-6,5-7 |
| ITF Thailand F12 Qual | 2017/12/11 04:15 | Sung Jun Park v Colin Sinclair | 3-6,4-6 |
| ITF Thailand F12 Qual | 2017/12/10 03:00 | Colin Sinclair v Min Hyeok Cho | 4-6,6-4,6-4 |
| ITF Thailand F12 Qual | 2017/12/09 05:30 | Colin Sinclair v Chattarin Wareesri | 6-0,6-0 |
| ITF Thailand F11 Qual | 2017/12/03 03:00 | Daniiar Duldaev v Colin Sinclair | 7-6,6-0 |
| ITF Thailand F11 Qual | 2017/12/02 05:00 | Colin Sinclair v Yuttana Charoenphon | 6-1,6-3 |
| ITF Thailand F10 | 2017/11/29 03:00 | Alexey Vatutin v Colin Sinclair | 4-6,6-2,6-1 |
| ITF Singapore F3 | 2018/05/28 05:00 | Maverick Banes v Kazuki Nishiwaki | 6-7,6-4,7-6 |
| ITF Singapore F2 | 2018/05/25 03:00 | Kazuki Nishiwaki v Collin Altamirano | 7-5,2-6,3-6 |
| ITF Singapore F2 | 2018/05/24 04:55 | Kazuki Nishiwaki v Makoto Ochi | 6-2,7-5 |
| ITF Singapore F2 | 2018/05/23 06:25 | Kazuki Nishiwaki v Calum Puttergill | 6-3,7-6 |
| ITF Singapore F2 | 2018/05/22 02:00 | Jacob Grills v Kazuki Nishiwaki | 3-6,6-3,5-7 |
| ITF Singapore F2 | 2018/05/20 03:00 | Kazuki Nishiwaki v Ken Onoda | 6-1,6-2 |
| ITF Singapore F2 | 2018/05/19 02:00 | Kazuki Nishiwaki v Anthony Susanto | 6-0,6-1 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Chun Hsin Tseng v Kazuki Nishiwaki | 6-3,3-6,6-3 |