Stadium: Court 2 Round: 25 Ground: Clay
| ITF M25 - Houston | 2019/09/19 00:20 | Alexander Lebedev v Sam Riffice | 0-6,0-6 |
| US Open | 2019/08/19 15:00 | Stefano Napolitano v Sam Riffice | 6-2,6-4 |
| Challenger Aptos | 2019/08/07 01:00 | Sam Riffice v Taro Daniel | 4-6,0-6 |
| Challenger Aptos | 2019/08/05 18:45 | Sam Riffice v Yosuke Watanuki | 6-2,6-4 |
| Challenger Winnetka | 2019/07/09 18:35 | John McNally v Sam Riffice | 6-4,4-6,6-4 |
| ITF M25 - Tulsa | 2019/06/23 17:00 | Maxime Cressy v Sam Riffice | 6-3,6-1 |
| ITF M25 - Tulsa | 2019/06/22 16:30 | Sam Riffice v Ezekiel Clark | 6-3,6-3 |
| ITF M25 - Tulsa | 2019/06/21 15:00 | Sam Riffice v Alexander Sarkissian | 6-2,6-1 |
| Challenger Sarasota Qual | 2018/04/14 15:40 | Strong Kirchheimer v Micah Braswell | 6-2,6-4 |