| 03/27/22 | Sijia Liu over John Gardner | 6-4; 6-3 | |
| 08/10/21 | John Gardner over Sijia Liu | 6-2; 2-6; 6-4 | |
| 07/27/21 | Sijia Liu over John Gardner |
6-2; 1-6; TB 10-5 |
|
| 04/17/21 | Sijia Liu over John Gardner | 6-3; 6-3 | |
| 02/28/21 | John Gardner over Sijia Liu | 2-6; 6-3; 7-6 | |
| 01/23/21 | John Gardner over Sijia Liu | 6-3 | |
| 12/22/20 | Sijia Liu over John Gardner | 6-1; 7-6 | |
| 10/26/20 | Sijia Liu over John Gardner | 6-0; 4-6; 6-2 | |
| 09/08/20 | John Gardner over Sijia Liu | 6-3; 6-3 | |
| 09/03/20 | John Gardner ties Sijia Liu | 9-9 Tie | |
| 08/17/20 | Sijia Liu over John Gardner | 6-2; 6-3 |
