Head to Head includes singles and doubles results.
| 02/24/24 | Keiji Tomita over Giao Nguyen |
6-4; 4-6; TB 10-4 |
|
| 02/07/23 | Keiji Tomita over Giao Nguyen | 7-5; 6-1 | |
| 10/06/22 | Giao Nguyen over Keiji Tomita | 10-5 | |
| 08/20/20 | Keiji Tomita over Giao Nguyen | 6-3; 6-2 | |
| 08/14/20 | Keiji Tomita over Giao Nguyen | 10-2 | |
| 06/30/19 | Keiji Tomita over Giao Nguyen | 6-3; 6-3 | |
| 06/23/19 | Keiji Tomita over Giao Nguyen |
2-6; 6-1; TB 10-8 |
|
| 04/05/19 | Keiji Tomita over Giao Nguyen | 6-4; 6-2 | |
| 09/28/18 | Keiji Tomita over Giao Nguyen |
3-6; 7-6; TB 10-7 |
|
| 09/09/18 | Keiji Tomita over Giao Nguyen | 6-2; 6-4 | |
| 06/14/18 | Keiji Tomita over Giao Nguyen | 6-3; 6-3 | |
| 02/07/18 | Giao Nguyen over Keiji Tomita |
6-3; 3-6; TB 10-8 |
|
| 09/14/17 | Keiji Tomita over Giao Nguyen | 6-3; 7-5 | |
| 08/28/17 | Keiji Tomita over Giao Nguyen | 6-1; 6-1 | |
| 09/01/16 | Keiji Tomita over Giao Nguyen | 6-4; 6-2 | |
| 08/09/16 | Keiji Tomita over Giao Nguyen | 6-2; 6-4 | |
| 11/01/15 | Keiji Tomita over Giao Nguyen | 4-6; 6-3; 1-0 Ret. | Playoff Match |
| 01/28/15 | Giao Nguyen over Keiji Tomita | 7-6; 5-7; 6-2 | |
| 01/21/15 | Giao Nguyen over Keiji Tomita | 7-5; 7-6 | |
| 12/17/14 | Keiji Tomita over Giao Nguyen | 2-6; 6-3; 6-4 | |
| 12/04/14 | Keiji Tomita over Giao Nguyen |
1-6; 6-1; TB 10-4 |
|
| 10/30/14 | Giao Nguyen over Keiji Tomita | 6-2; 6-3 | |
| 10/02/14 | Keiji Tomita over Giao Nguyen |
3-6; 6-3; TB 10-7 |
|
| 09/14/14 | Giao Nguyen over Keiji Tomita | 6-4; 6-2 | |
| 08/28/14 | Keiji Tomita over Giao Nguyen | 6-4; 2-6; 6-4 | |
| 08/08/14 | Keiji Tomita ties Giao Nguyen | 6-1; 1-6; 5-5 Tie |
