| Challenger Charlottesville | 10/29 23:40 | 14 | Alexander Kiefer v Christian Harrison | Walkover | |
| UTR Pro Tennis Series Zadar | 07/03 10:00 | - | Yaraslav Shyla v Alexander Kiefer | 7-5,6-2 | |
| UTR Pro Tennis Series Zadar | 07/02 09:30 | - | Alexander Kiefer v Matija Pecotic | 1-6,0-6 | |
| UTR Pro Tennis Series Zadar | 07/01 12:45 | - | Alexander Kiefer v Aleksei Khomich | 6-3,5-3 | |
| UTR Pro Tennis Series Zadar | 06/30 09:30 | - | Karlo Kajin v Alexander Kiefer | 3-6,1-6 | |
| UTR Pro Tennis Series Zadar | 06/29 14:00 | - | Ryan Goetz v Alexander Kiefer | 6-0,6-2 | |
| International Tennis Series | 06/23 14:40 | 1 | Alexander Kiefer v Caleb Strother | CANC | |
| International Tennis Series | 06/23 13:25 | 1 | Enzo Wallart v Alexander Kiefer | CANC |