Head to Head includes singles and doubles results.
| 05/14/19 | Roman Gerber over Jason Williams | 6-2; 6-1 | |
| 04/26/19 | Jason Williams over Roman Gerber | 6-3; 6-3 | |
| 10/13/18 | Roman Gerber over Jason Williams | 6-3; 6-4 | |
| 09/06/18 | Roman Gerber over Jason Williams | 6-2; 6-1 | |
| 07/31/18 | Roman Gerber over Jason Williams | 6-1; 6-1 | |
| 07/03/18 | Roman Gerber over Jason Williams | 6-3; 6-3 |
