Stadium: St. Joseph's/Candler Stadium Round: 24 Ground: Clay
| Challenger Tallahassee | 2019/04/24 16:30 | Collin Altamirano v Nino Serdarusic | 3-6,6-2,6-7 |
| Challenger Tallahassee | 2019/04/22 18:05 | Ryan Shane v Collin Altamirano | 4-6,6-7 |
| Challenger Sarasota | 2019/04/16 19:30 | Peter Polansky v Collin Altamirano | 6-1,6-4 |
| Challenger Sarasota | 2019/04/15 19:45 | Evgeny Karlovskiy v Collin Altamirano | 7-6,4-6,4-6 |
| Challenger Taipei | 2019/04/08 09:40 | Collin Altamirano v Chien Hsun Lo | 5-7,7-5,3-6 |
| 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 |
| ITF M25 Shymkent | 2019/04/20 05:15 | Roman Safiullin v Alen Avidzba | 1-6,6-1,6-4 |
| ITF M25 Shymkent | 2019/04/19 11:20 | Alen Avidzba v Fabrizio Ornago | 6-3,5-7,6-3 |
| ITF M25 Shymkent | 2019/04/18 07:10 | Alen Avidzba v George Tsivadze | 6-2,6-4 |
| ITF M25 Shymkent | 2019/04/17 04:00 | Alen Avidzba v Grigoriy Lomakin | 7-5,6-7,6-1 |
| ITF M25 Shymkent | 2019/04/14 05:00 | Roman Safiullin v Alen Avidzba | 7-6,6-2 |
| ITF M25 Shymkent | 2019/04/12 07:10 | Andrey Golubev v Alen Avidzba | 4-6,7-6,1-6 |
| ITF M25 Shymkent | 2019/04/11 03:30 | Markos Kalovelonis v Alen Avidzba | 3-6,3-6 |
| ITF M25 Shymkent | 2019/04/10 11:15 | Manish Sureshkumar v Alen Avidzba | 4-6,0-6 |