Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Anseong | 2019/06/28 02:45 | Thomas Fancutt v Oh, Seong-Gook | 7-6,7-6 |
| ITF - M15 Anseong | 2019/06/27 01:00 | Kwon, OH-Hee v Oh, Seong-Gook | 2-6,2-6 |
| ITF - M15 Anseong | 2019/06/25 05:05 | Jung, Hyeon IL v Oh, Seong-Gook | 1-6,0-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/18 05:45 | Sanhui Shin v Oh, Seong-Gook | 6-1,6-4 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/13 01:30 | Oh, Seong-Gook v Park, Sung Jun | 6-1,5-7,4-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/12 03:20 | Oh, Seong-Gook v Seita Watanabe | 6-7,6-2,6-3 |
| ITF - M15 Daegu | 2019/06/08 04:30 | Oh, Seong-Gook v Hong, Seong Chan | 1-6,2-6 |
| ITF - M15 Daegu | 2019/06/08 01:00 | Oh, Seong-Gook v Kim, Young Seok | 6-2,6-2 |
| ITF M25 Pardubice | 2019/06/25 08:00 | Vladyslav Orlov v Styler, Ondrej | 3-6,6-7 |
| ITF M25 Pardubice | 2019/06/24 08:00 | Vladyslav Orlov v Jiri Jenicek | 6-3,6-3 |
| Netanya, Singles Qualifying M-ITF-ISR-03A | 2019/06/22 06:30 | Soares Klier, Gilbert v Vladyslav Orlov | 7-6,7-5 |
| Netanya, Singles Qualifying M-ITF-ISR-03A | 2019/06/20 08:50 | Vladyslav Orlov v Amar, Ran | 6-2,4-6,6-1 |
| Netanya, Singles Qualifying M-ITF-ISR-03A | 2019/06/19 13:05 | Vladyslav Orlov v Rieder, Horst | 6-2,6-4 |
| Plovdiv, Singles Qualifying M-ITF-BUL-03A | 2019/06/07 07:30 | Dimitar Kuzmanov v Vladyslav Orlov | 7-5,2-6,6-3 |
| Plovdiv, Singles Qualifying M-ITF-BUL-03A | 2019/06/06 07:00 | Dan Alexandru Tomescu v Vladyslav Orlov | 1-6,6-7 |
| Plovdiv, Singles Qualifying M-ITF-BUL-03A | 2019/06/04 11:00 | Vladyslav Orlov v Frunza, Nicolae | 7-6,6-3 |