Stadium: C Round: 26
| Challenger Stockton | 2018/10/02 17:00 | William Blumberg v JC Aragone | 3-6,6-2,6-2 |
| Challenger Stockton | 2018/10/01 17:00 | Pablo Vivero Gonzalez v William Blumberg | 4-6,1-6 |
| Challenger Stockton | 2018/09/30 17:00 | William Blumberg v Steven Diez | 6-2,4-6,6-4 |
| Challenger Stockton | 2018/09/29 17:00 | Ross Watson v William Blumberg | 4-6,2-6 |
| Challenger Cary | 2018/09/12 17:00 | William Blumberg v Jose Hernandez-Fernandez | 4-6,3-6 |
| Challenger Binghamton | 2018/07/26 15:45 | William Blumberg v Lucas Catarina | 4-6,6-2,4-6 |
| ATP Newport Qual | 2018/07/15 16:25 | Matthias Bachinger v William Blumberg | 5-7,7-5,6-2 |
| Challenger Cary | 2017/09/14 19:00 | Mitchell Krueger v William Blumberg | 6-2,6-2 |
| Challenger Stockton | 2018/10/01 23:10 | Jenson Brooksby v Noah Rubin | 2-6,4-6 |
| Challenger Tiburon | 2018/09/29 19:20 | Marcel Granollers v Noah Rubin | 6-2,6-2 |
| Challenger Tiburon | 2018/09/28 19:25 | Christopher Eubanks v Noah Rubin | 4-6,3-6 |
| Challenger Tiburon | 2018/09/26 20:00 | JC Aragone v Noah Rubin | 6-7,4-6 |
| Challenger Tiburon | 2018/09/24 22:20 | Thiemo De Bakker v Noah Rubin | 0-6,0-6 |
| Challenger Chicago | 2018/09/07 16:30 | Noah Rubin v Bjorn Fratangelo | 1-6,4-6 |
| Challenger Chicago | 2018/09/06 15:00 | Noah Rubin v Alexei Popyrin | 5-7,6-2,7-5 |
| Challenger Chicago | 2018/09/04 15:00 | Noah Rubin v Evan King | 6-4,3-6,6-3 |