Stadium: Centre Court Round: 24 Ground: Hardcourt indoor
| Challenger Monterrey | 2019/04/01 23:05 | Carlos Gomez-Herrera v Collin Altamirano | 6-1,6-4 |
| Challenger St Brieuc | 2019/03/25 13:20 | Collin Altamirano v Lucas Miedler | 3-6,3-6 |
| Challenger Drummondville | 2019/03/13 23:20 | Ricardas Berankis v Collin Altamirano | 6-4,7-5 |
| Challenger Drummondville | 2019/03/12 15:25 | Manuel Guinard v Collin Altamirano | 4-6,3-6 |
| Challenger Chennai | 2019/02/06 04:30 | Gianluca Mager v Collin Altamirano | 6-3,6-1 |
| Challenger Chennai | 2019/02/05 06:30 | Kaito Uesugi v Collin Altamirano | 6-1,3-6,6-7 |
| Challenger Newport Beach | 2019/01/25 22:55 | Donald Young v Collin Altamirano | 6-2,6-1 |
| Challenger Newport Beach | 2019/01/24 21:50 | Collin Altamirano v Dustin Brown | 7-6,6-2 |
| ITF M15 Sharm El Sheikh | 2019/03/19 08:00 | Chien Hsun Lo v Riccardo Maiga | 6-7,6-3,6-7 |
| ITF M15 Sharm El Sheikh | 2019/03/13 13:05 | Adrian Bodmer v Chien Hsun Lo | 6-7,7-5,7-5 |
| ITF M15 Sharm El Sheikh | 2019/03/07 10:20 | Adam Moundir v Chien Hsun Lo | 6-4,6-2 |
| ITF M25 Aktobe | 2019/02/19 11:05 | Chien Hsun Lo v Sagadat Ayap | 6-1,3-6,4-6 |
| ITF M25 Aktobe | 2019/02/13 07:10 | Chien Hsun Lo v Mikhail Elgin | 2-6,2-6 |
| Challenger Canberra | 2019/01/06 03:25 | Chien Hsun Lo v Marc-Andrea Huesler | 5-7,2-6 |
| ITF M25 Hong Kong | 2019/01/02 06:35 | Chien Hsun Lo v Alen Avidzba | 0-6,4-6 |
| Challenger Pune | 2018/11/18 10:05 | Chien Hsun Lo v Sebastian Fanselow | 3-6,3-6 |