Head to Head includes singles and doubles results.
| 02/28/22 | Jeff Engelbrecht over John Mack | 7-6; 6-4 | |
| 10/23/21 | Jeff Engelbrecht over John Mack | 6-7; 6-0; 4-0 Ret. | |
| 04/21/21 | Jeff Engelbrecht over John Mack | 6-3; 7-6 | |
| 02/10/21 | John Mack over Jeff Engelbrecht | 6-4; 6-3 | |
| 11/24/20 | Jeff Engelbrecht over John Mack | 6-3; 6-3 |
