Stadium: Court 1 Round: 62
| ITF Korea F5 | 2018/08/18 02:00 | Jumpei Yamasaki v Dukyoung Kim | 6-4,6-4 |
| Challenger Gwangju Qual | 2018/08/12 01:30 | Yecong He v Jumpei Yamasaki | 6-2,6-4 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Fajing Sun v Jumpei Yamasaki | 1-6,6-2,2-6 |
| Challenger Jinan Qual | 2018/08/04 02:00 | Matej Sabanov v Jumpei Yamasaki | 6-4,6-4 |
| Challenger Chengdu Qual | 2018/07/28 02:00 | Miliaan Niesten v Jumpei Yamasaki | 6-2,6-2 |
| Challenger Granby Qual | 2018/07/21 16:25 | Taha Baadi v Jumpei Yamasaki | 7-6,6-4 |
| Challenger Gatineau Qual | 2018/07/14 21:55 | Jacob Grills v Jumpei Yamasaki | 6-3,6-1 |
| Challenger Winnipeg Qual | 2018/07/08 18:05 | Sem Verbeek v Jumpei Yamasaki | 7-6,7-6 |
| ITF Korea F5 | 2018/08/18 02:00 | Hyun Bin Jin v In Kyo Jeong | 0-6,3-6 |
| ITF Korea F4 | 2018/08/12 02:00 | In Kyo Jeong v Jin Sung Han | 5-7,6-7 |
| ITF Korea F4 | 2018/08/11 01:00 | Hyun Sik Go v In Kyo Jeong | 4-6,3-6 |
| ITF Malaysia F1 Qual | 2018/07/02 05:25 | Lakshit Sood v In Kyo Jeong | 6-4,7-5 |
| ITF Malaysia F1 Qual | 2018/07/01 09:30 | In Kyo Jeong v Kittirat Kerdlaphee | 6-4,2-6,6-1 |
| ITF Malaysia F1 Qual | 2018/07/01 03:00 | In Kyo Jeong v Naufal Siddiq Kamaruzzaman | 6-0,6-4 |
| ITF Korea F3 Qual | 2018/06/16 02:00 | In Kyo Jeong v Chukang Wang | 3-6,0-6 |
| ITF Korea F2 | 2018/06/10 05:00 | Mitchell Thomas McDaniels v In Kyo Jeong | 6-2,6-2 |