Head to Head includes singles and doubles results.
| 08/24/22 | Alexander Kostal over William Reiss | 7-6; 6-4 | |
| 05/11/22 | William Reiss over Alexander Kostal | 6-3; 6-4 | |
| 08/15/21 | Alexander Kostal over William Reiss | 1-6; 6-3; 6-2 |
