Stadium: Center Court Round: 25
| 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 Cary | 2017/09/12 20:00 | William Blumberg v Brydan Klein | 6-2,7-6 |
| Challenger Tiburon | 2018/09/26 20:00 | JC Aragone v Noah Rubin | 6-7,4-6 |
| Challenger Tiburon | 2018/09/24 18:35 | Jay Clarke v JC Aragone | 2-6,6-7 |
| Challenger Cary | 2018/09/11 20:45 | Alexei Popyrin v JC Aragone | 6-3,6-4 |
| Challenger Chicago | 2018/09/07 17:40 | JC Aragone v Dominik Koepfer | 4-6,2-6 |
| Challenger Chicago | 2018/09/06 17:45 | Alexander Sarkissian v JC Aragone | 6-2,6-7,6-7 |
| Challenger Chicago | 2018/09/04 17:25 | Daniel Elahi Galan v JC Aragone | 6-7,3-6 |
| US Open | 2018/08/24 15:00 | JC Aragone v Lloyd Harris | 4-6,2-6 |
| US Open | 2018/08/23 15:00 | Thomas Fabbiano v JC Aragone | 5-7,1-6 |