Stadium: Court 5 Round: 26 Ground: Hardcourt indoor
| Challenger Columbus | 2019/06/11 20:30 | Alejandro Gonzalez v Nicolas Mejia | 6-2,6-4 |
| Challenger Columbus | 2019/06/10 18:00 | Alejandro Gonzalez v Aleksandar Kovacevic | 6-4,6-7,6-2 |
| Challenger Little Rock | 2019/06/04 22:50 | Alejandro Gonzalez v Alexander Ritschard | 4-6,4-6 |
| Challenger Samarkand | 2019/05/13 09:25 | Alejandro Gonzalez v Denis Yevseyev | 3-6,7-6,4-6 |
| Challenger Braga | 2019/05/06 15:20 | Alejandro Gonzalez v Benjamin Bonzi | 1-6,4-6 |
| Challenger Savannah | 2019/05/02 18:35 | Alejandro Gonzalez v Tommy Paul | 6-4,6-7,5-7 |
| Challenger Savannah | 2019/05/01 17:05 | Emilio Gomez v Alejandro Gonzalez | 0-6,3-6 |
| Challenger Savannah | 2019/04/29 21:00 | Alejandro Gonzalez v Jordi Arconada | 6-4,6-2 |
| Challenger Columbus | 2019/06/12 16:10 | Ji Sung Nam v Jeffrey John Wolf | 6-4,3-6,6-4 |
| Challenger Columbus | 2019/06/10 22:45 | Cannon Kingsley v Ji Sung Nam | 5-7,4-6 |
| Challenger Little Rock | 2019/06/04 17:50 | Joao Menezes v Ji Sung Nam | 5-7,6-1,6-2 |
| ITF M25 Nonthaburi | 2019/05/26 03:00 | Ji Sung Nam v Shuichi Sekiguchi | 1-6,4-6 |
| ITF M25 Nonthaburi | 2019/05/25 03:00 | Ji Sung Nam v Shintaro Imai | 6-4,7-5 |
| ITF M25 Nonthaburi | 2019/05/24 04:00 | Ji Sung Nam v Khumoyun Sultanov | 6-3,6-1 |
| ITF M25 Nonthaburi | 2019/05/23 06:00 | Ji Sung Nam v Ryota Tanuma | 7-6,6-3 |
| Challenger Gwangju | 2019/05/14 06:00 | Ji Sung Nam v Yuichi Sugita | 2-6,2-6 |