Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF Singapore F3 | 2018/05/29 04:05 | Niki, Takuto v Congsup Congcar | 5-7,1-6 |
| ITF Singapore F2 | 2018/05/26 03:00 | Niki, Takuto v Collin Altamirano | 6-7,3-6 |
| ITF Singapore F2 | 2018/05/24 03:00 | Nolan, Daniel v Niki, Takuto | 6-1,6-7,4-6 |
| ITF Singapore F2 | 2018/05/23 02:00 | Niki, Takuto v Hu, Nicholas S | 6-4,6-4 |
| ITF Singapore F2 | 2018/05/22 03:50 | Frawley, James v Niki, Takuto | 6-2,4-6,1-6 |
| Challenger Seoul Qual | 2018/04/28 03:05 | Kang, Hogi v Niki, Takuto | 6-7,6-2,0-6 |
| ITF Japan F6 | 2018/04/11 01:00 | Makoto Ochi v Niki, Takuto | 7-5,6-3 |
| ITF Japan F5 | 2018/04/04 01:00 | Niki, Takuto v Ehara, Hiroyasu | 2-6,6-2,4-6 |
| ITF Korea F1 | 2018/06/04 03:55 | Park, Sung Jun v Kim, Sang Yeop | 3-6,3-6 |
| ITF Korea F5 | 2017/06/27 01:30 | Kim, Sang Yeop v Kim, A-Ram | 6-7,4-6 |
| ITF Korea F4 | 2017/06/20 04:30 | Kim, Sang Yeop v Kim, Cheong-Eui | 0-6,2-6 |
| ITF Korea F4 | 2017/06/19 01:00 | Kim, Sang Yeop v Shin, Geon Ju | 6-3,6-4 |
| ITF Korea F4 | 2017/06/18 01:00 | Lee, Dae-Hee v Kim, Sang Yeop | 3-6,4-6 |
| ITF Korea F4 | 2017/06/17 01:00 | Shin, Donghwi v Kim, Sang Yeop | 2-6,2-6 |
| Korea F3, Singles Qualifying | 2017/06/12 03:00 | Kim, Hyun-Joon v Kim, Sang Yeop | 6-0,6-1 |
| Korea F3, Singles Qualifying | 2017/06/10 03:00 | Park, Sung Jun v Kim, Sang Yeop | 2-6,2-6 |