Stadium: Court 3 Round: 45
| Challenger Gimcheon | 2018/05/11 02:00 | Yoshihito Nishioka v Makoto Ochi | 6-2,6-2 |
| Challenger Gimcheon | 2018/05/10 02:00 | Makoto Ochi v Luke Saville | 4-6,6-1,7-6 |
| Challenger Gimcheon | 2018/05/08 05:40 | Young Seok Lee v Makoto Ochi | 1-6,1-6 |
| Challenger Gimcheon Qual | 2018/05/07 05:00 | Makoto Ochi v Luke Saville | 2-6,6-3,7-6 |
| Challenger Gimcheon Qual | 2018/05/06 04:30 | Hiroyasu Ehara v Makoto Ochi | 7-6,3-6,4-6 |
| Challenger Gimcheon Qual | 2018/05/05 02:50 | Tae-Woo Lee v Makoto Ochi | 4-6,1-6 |
| Challenger Seoul | 2018/05/01 03:00 | Makoto Ochi v Jason Jung | 4-6,0-6 |
| Challenger Seoul Qual | 2018/04/30 03:00 | Luke Saville v Makoto Ochi | 6-7,3-6 |
| Challenger Seoul Qual | 2018/04/28 04:30 | Yong-Kyu Lim v Frederik Nielsen | 6-4,6-1 |
| Davis Cup | 2018/04/07 10:00 | Frederik Nielsen v Karim-Mohamed Maamoun | 6-3,3-6,6-7 |
| Challenger Drummondville Qual | 2018/03/12 22:55 | Frederik Nielsen v Aleksandar Vukic | 2-6,4-6 |
| Challenger Drummondville Qual | 2018/03/11 17:15 | Frederik Nielsen v Pavel Krainik | View |
| ITF Canada F2 | 2018/03/06 15:00 | Frederik Nielsen v Jared Hiltzik | 4-6,6-4,2-6 |
| ITF Canada F2 Qual | 2018/03/05 14:30 | Frederik Nielsen v Ricardo Rodriguez-Pace | 3-6,6-3,6-4 |
| ITF Canada F2 Qual | 2018/03/04 15:00 | Frederik Nielsen v Luis David Martinez | 6-3,6-4 |
| ITF Canada F1 | 2018/02/27 16:00 | Deiton Baughman v Frederik Nielsen | 6-3,6-3 |