Stadium: Court 4 Round: 25 Ground: Clay
| Challenger Winnipeg Qual | 2018/07/08 21:50 | Yunseong Chung v Yshai Oliel | 6-3,6-1 |
| ITF - M15 Antalya | 2020/02/21 09:15 | Jonas Forejtek v Yshai Oliel | 6-3,6-2 |
| ITF - M15 Antalya | 2020/02/20 07:00 | Voronin, Dimitriy v Yshai Oliel | 2-6,4-6 |
| ITF - M15 Antalya | 2020/02/19 11:30 | Max Houkes v Yshai Oliel | 3-6,2-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/04 05:55 | Yshai Oliel v El Midhawy, Adam | 5-7,4-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/29 07:45 | Matija Pecotic v Yshai Oliel | 6-3,6-2 |
| ITF - M15 Héraklion | 2019/12/11 12:00 | Jonas Trinker v Yshai Oliel | 4-6,0-6 |
| ITF - M15 Héraklion | 2019/12/07 10:35 | Boris Pokotilov v Yshai Oliel | 4-6,6-4,7-6 |
| ITF - M15 Héraklion | 2019/12/06 08:00 | David Pichler v Yshai Oliel | 2-6,4-6 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2020/02/20 05:00 | Ivanov, Vladimir v Yunseong Chung | 3-6,6-2,7-6 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2020/02/19 07:15 | Balzerani, Riccardo v Yunseong Chung | 6-3,4-6,4-6 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2020/02/13 04:55 | Otto Virtanen v Yunseong Chung | 6-7,6-3,6-2 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2020/02/12 10:40 | Shyla, Yaraslau v Yunseong Chung | 6-7,6-7 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/06 05:30 | Matija Pecotic v Yunseong Chung | 6-0,6-3 |
| Bangkok, Thaïlande | 2020/01/12 06:40 | Jack Draper v Yunseong Chung | 7-6,6-3 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/07 05:30 | Yunseong Chung v Tatsuma Ito | 6-1,4-6,4-6 |
| Open d'Australie Playoff Wilcard Australienne | 2019/12/06 06:00 | Mukund Sasikumar v Yunseong Chung | 4-6,3-6 |