Stadium: I Round: 45 Ground: Clay
| Challenger Aix en Provence Qual | 2018/05/06 09:00 | Guillermo Duran v Antoine Escoffier | 3-6,2-6 |
| Challenger Aix en Provence Qual | 2018/05/05 08:30 | Clement Geens v Guillermo Duran | 3-6,2-6 |
| Challenger Francavilla Qual | 2018/04/21 14:15 | Antoine Hoang v Guillermo Duran | 6-2,6-3 |
| Challenger Orleans | 2017/09/26 14:00 | Mikhail Kukushkin v Guillermo Duran | 6-1,6-3 |
| Challenger Orleans Qual | 2017/09/24 11:00 | Guillermo Duran v Mick Lescure | 2-6,6-4,6-2 |
| Challenger Orleans Qual | 2017/09/23 14:15 | Alex De Minaur v Guillermo Duran | 3-6,3-6 |
| ATP Metz Qual | 2017/09/17 11:30 | Guillermo Duran v Ugo Humbert | 6-2,1-6,6-7 |
| Challenger Szczecin | 2017/09/12 15:00 | Jerzy Janowicz v Guillermo Duran | 6-4,6-1 |
| Challenger Savannah | 2018/05/01 14:00 | Sam Riffice v Marc Polmans | 6-1,4-6,2-6 |
| ITF USA F10 | 2018/04/14 18:55 | Karue Sell v Sam Riffice | 6-2,4-6,6-1 |
| ITF USA F10 | 2018/04/13 15:00 | Michael Redlicki v Sam Riffice | 4-6,4-6 |
| ITF USA F10 | 2018/04/12 18:00 | Sam Riffice v Samuel Monette | 6-2,6-3 |
| ITF USA F10 | 2018/04/11 18:40 | Sam Riffice v Samuel Shropshire | 6-2,6-0 |
| ITF USA F10 Qual | 2018/04/10 17:05 | Sam Riffice v Frank Barnett | 6-0,6-1 |
| ITF USA F10 Qual | 2018/04/09 15:00 | Sam Riffice v Noah Schachter | 6-3,6-4 |
| ITF USA F10 Qual | 2018/04/08 16:00 | Sam Riffice v Austin Williams | 6-2,6-1 |