Stadium: Court 8 Round: 26
| ITF Korea F5 | 2018/08/21 03:00 | Ito, Yuichi v Oh, Chan-Yeong | 7-6,6-7,3-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | He, Yecong v Oh, Chan-Yeong | 7-6,6-0 |
| ITF Korea F3 | 2018/06/18 01:00 | Yu, Cheng-Yu v Oh, Chan-Yeong | 6-4,6-2 |
| ITF Korea F2 | 2018/06/15 03:20 | Oh, Chan-Yeong v Yunseong Chung | 6-7,6-3,4-6 |
| ITF Korea F2 | 2018/06/14 01:00 | Oh, Chan-Yeong v Mcdaniels, Mitchell Thomas | 6-2,3-6,6-3 |
| ITF Korea F2 | 2018/06/13 06:45 | Chung, Hong v Oh, Chan-Yeong | 2-6,2-6 |
| ITF Korea F2 | 2018/06/11 03:30 | Oh, Chan-Yeong v Kim, Sang Yeop | 6-3,6-3 |
| ITF Korea F1 | 2018/06/07 01:00 | Oh, Chan-Yeong v Lee, Tae-Woo | 4-6,2-6 |
| ITF Korea F5 | 2018/08/21 03:00 | Kim, Jung Hoon v Lucas Catarina | 0-6,2-6 |
| Challenger - Gwangju | 2018/08/13 08:40 | Lucas Catarina v Makoto Ochi | 3-6,2-6 |
| Challenger Lexington | 2018/07/31 01:45 | Jomby, Tom v Lucas Catarina | 6-2,7-6 |
| Binghamton, USA | 2018/07/26 23:00 | Lucas Catarina v Granollers, Marcel | 2-6,4-6 |
| Binghamton, USA | 2018/07/26 15:45 | Blumberg, William v Lucas Catarina | 4-6,6-2,4-6 |
| Challenger Gatineau Qual | 2018/07/15 20:00 | Lucas Catarina v Boulais, Justin | 6-0,5-7,6-7 |
| Challenger Gatineau Qual | 2018/07/15 02:00 | Lucas Catarina v Takeuchi, Kento (1987) | 6-3,6-3 |
| Winnetka, USA | 2018/07/10 19:05 | Mohamed Safwat v Lucas Catarina | 6-2,6-4 |