Stadium: Court 5 Round: 26 Ground: Hardcourt indoor
| Challenger Columbus | 2019/06/12 18:10 | Duckhee Lee v John McNally | 6-3,7-5 |
| Challenger Little Rock | 2019/06/08 21:00 | Duckhee Lee v Darian King | 6-0,6-0 |
| Challenger Little Rock | 2019/06/08 16:35 | Duckhee Lee v Mitchell Krueger | 4-6,6-3,6-1 |
| Challenger Little Rock | 2019/06/07 21:00 | Zhizhen Zhang v Duckhee Lee | 4-6,7-6,6-7 |
| Challenger Little Rock | 2019/06/05 15:00 | Jordi Arconada v Duckhee Lee | 1-6,4-6 |
| Challenger Gwangju | 2019/05/15 03:40 | Duckhee Lee v Yunseong Chung | 4-6,2-6 |
| Challenger Busan | 2019/05/09 04:40 | Ricardas Berankis v Duckhee Lee | 6-3,3-6,6-3 |
| Challenger Busan | 2019/05/08 04:50 | Duckhee Lee v Yuichi Sugita | 5-7,6-3,7-6 |
| Challenger Columbus | 2019/06/12 16:35 | Matias Franco Descotte v Dudi Sela | 3-6,3-6 |
| Challenger Little Rock | 2019/06/08 20:40 | Dudi Sela v Thai-Son Kwiatkowski | 6-3,7-6 |
| Challenger Little Rock | 2019/06/08 15:00 | Ryan Shane v Dudi Sela | 3-6,1-6 |
| Challenger Little Rock | 2019/06/07 17:00 | Alexander Ritschard v Dudi Sela | 4-6,6-4,3-6 |
| Challenger Little Rock | 2019/06/05 15:00 | Evan Song v Dudi Sela | 3-6,4-6 |
| Challenger Jerusalem | 2019/05/22 12:30 | Dudi Sela v Danilo Petrovic | 3-6,6-7 |
| Challenger Gwangju | 2019/05/19 03:25 | Jason Jung v Dudi Sela | 6-4,6-2 |
| Challenger Gwangju | 2019/05/18 02:00 | Dudi Sela v Soonwoo Kwon | 6-4,7-5 |