Stadium: Hamilton Family Stadium Round: 24 Ground: Hardcourt indoor
| Challenger Stockton | 2018/10/04 16:30 | William Blumberg v Noah Rubin | 1-6,6-4,4-6 |
| 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 Cleveland | 2019/01/28 22:55 | Vincent Millot v Mikael Torpegaard | 3-6,3-6 |
| Challenger Columbus | 2019/01/11 17:00 | Mikael Torpegaard v Vincent Millot | 6-7,7-6,6-0 |
| Challenger Columbus | 2019/01/10 16:00 | Gastao Elias v Vincent Millot | 4-6,6-1,1-6 |
| Challenger Columbus | 2019/01/08 19:50 | Vincent Millot v Dennis Novikov | 7-5,7-6 |
| Challenger Columbus | 2019/01/07 16:40 | Vincent Millot v Kaichi Uchida | 6-4,6-4 |
| Challenger Calgary | 2018/10/17 00:05 | Roberto Quiroz v Vincent Millot | 1-6,7-5,6-1 |
| Challenger Calgary | 2018/10/14 17:10 | Vincent Millot v Laurent Rochette | 7-6,5-7,6-4 |
| Challenger Calgary | 2018/10/13 18:55 | Vincent Millot v Shane Nicholls | 6-2,6-1 |