Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| Challenger Winnetka | 2019/07/08 16:25 | Collin Altamirano v Martin Redlicki | 6-2,4-6,6-4 |
| Challenger Columbus | 2019/06/13 14:00 | Collin Altamirano v Emilio Gomez | 5-7,7-5,0-6 |
| Challenger Columbus | 2019/06/11 17:55 | Collin Altamirano v James Trotter | 6-3,6-1 |
| Challenger Little Rock | 2019/06/08 00:10 | Collin Altamirano v Raymond Sarmiento | 4-6,4-6 |
| Challenger Little Rock | 2019/06/04 15:00 | Collin Altamirano v Alexander Sarkissian | 6-3,6-1 |
| Challenger Jerusalem | 2019/05/22 07:00 | Edan Leshem v Collin Altamirano | 1-6,6-1,6-4 |
| Challenger Savannah | 2019/05/01 18:15 | Noah Rubin v Collin Altamirano | 6-2,2-6,2-6 |
| Challenger Savannah | 2019/04/29 17:25 | Collin Altamirano v Alen Avidzba | 6-0,7-6 |
| ATP Eastbourne | 2019/06/22 15:30 | Thai-Son Kwiatkowski v Tennys Sandgren | 4-6,1-6 |
| Challenger Columbus | 2019/06/15 15:00 | Thai-Son Kwiatkowski v Mikael Torpegaard | 4-6,6-7 |
| Challenger Columbus | 2019/06/14 15:00 | Thai-Son Kwiatkowski v Emilio Gomez | 2-6,6-0,6-3 |
| Challenger Columbus | 2019/06/13 14:00 | Thiago Seyboth Wild v Thai-Son Kwiatkowski | 6-3,5-7,2-6 |
| Challenger Columbus | 2019/06/11 17:35 | Daniel Nguyen v Thai-Son Kwiatkowski | 6-4,2-6,4-6 |
| 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 | Thai-Son Kwiatkowski v Christopher Eubanks | 7-6,6-3 |
| Challenger Little Rock | 2019/06/07 19:10 | Noah Rubin v Thai-Son Kwiatkowski | 5-7,5-7 |