Stadium: COURT 3 Round: 24 Ground: Hardcourt outdoor
| Challenger Lexington | 2018/07/30 17:25 | Alexander Ward v Sam Riffice | 6-3,6-1 |
| Challenger Binghamton Qual | 2018/07/22 17:20 | Antoine Escoffier v Sam Riffice | 6-2,6-2 |
| Challenger Binghamton Qual | 2018/07/21 13:00 | Sam Riffice v Alexios Halebian | 6-3,6-7,6-1 |
| Challenger Winnetka Qual | 2018/07/07 15:00 | Sam Riffice v Collin Altamirano | 6-7,6-3,4-6 |
| ITF USA F17 | 2018/07/01 15:30 | Marc-Andrea Huesler v Sam Riffice | 6-4,6-2 |
| ITF USA F17 | 2018/06/30 15:00 | Sam Riffice v Emil Reinberg | 6-0,6-3 |
| ITF USA F17 | 2018/06/29 18:00 | Sam Riffice v Mikael Torpegaard | 7-5,6-1 |
| ITF USA F17 | 2018/06/28 15:00 | Henry Craig v Sam Riffice | 4-6,6-2,2-6 |
| Challenger Tiburon | 2018/09/24 17:00 | Jan Choinski v Roberto Ortega-Olmedo | 6-7,3-6 |
| Challenger Tiburon | 2018/09/23 17:00 | Jan Choinski v Alejandro Gomez | 6-4,1-6,6-0 |
| Challenger Columbus | 2018/09/17 16:35 | Jeffrey John Wolf v Jan Choinski | 7-5,6-4 |
| Challenger Cary | 2018/09/12 00:10 | Jan Choinski v Donald Young | 7-6,2-6,1-6 |
| ITF Belgium F9 | 2018/08/26 13:00 | Jan Choinski v Colin Sinclair | 3-6,7-6,6-3 |
| ITF Belgium F9 | 2018/08/25 12:00 | Jan Choinski v Samuel Brosset | 6-3,6-3 |
| ITF Belgium F9 | 2018/08/24 12:00 | Jan Choinski v Dan Added | 6-3,6-0 |
| ITF Belgium F9 | 2018/08/22 13:00 | Jan Choinski v Nikolas Sanchez Izquierdo | 6-3,6-3 |