Head to Head includes singles and doubles results.
| 05/07/24 | Mark Nechols over Keiji Tomita | 6-2; 6-0 | |
| 10/19/21 | Mark Nechols over Keiji Tomita | 6-1; 6-3 | |
| 01/19/21 | Mark Nechols over Keiji Tomita | 6-3; 6-3 | |
| 01/12/21 | Mark Nechols over Keiji Tomita | 6-0; 6-2 | |
| 11/03/20 | Keiji Tomita over Mark Nechols | 6-3; 6-3 | |
| 09/29/20 | Keiji Tomita over Mark Nechols | 6-3; 6-3 | |
| 12/05/19 | Mark Nechols over Keiji Tomita | 7-6; 6-3 | |
| 10/23/19 | Mark Nechols over Keiji Tomita | 1-6; 6-3; 6-4 |
