Stadium: Center Court Round: 28 Ground: Clay
| Challenger Braga | 2018/05/07 13:30 | Lorenzo Giustino v Scott Griekspoor | 4-6,6-3,6-3 |
| Challenger Guadalajara Qual | 2018/04/15 16:00 | Scott Griekspoor v Jose Olivares | 6-3,7-5 |
| Challenger Guadalajara Qual | 2018/04/14 15:00 | Scott Griekspoor v Nicolas Barrientos | 6-4,7-6 |
| ITF USA F10 | 2018/04/11 15:00 | Collin Altamirano v Scott Griekspoor | 7-6,6-3 |
| ITF USA F9 | 2018/04/08 17:10 | Scott Griekspoor v Sebastian Fanselow | 6-7,6-4,7-5 |
| ITF USA F9 | 2018/04/08 15:00 | Scott Griekspoor v Henry Craig | 7-5,7-5 |
| ITF USA F9 | 2018/04/07 15:30 | Scott Griekspoor v Collin Altamirano | 7-6,6-2 |
| ITF USA F9 | 2018/04/05 15:00 | Scott Griekspoor v Sam Riffice | 6-4,7-6 |
| Challenger Braga | 2018/05/08 09:00 | Tobias Kamke v Stephane Robert | 6-7,5-7 |
| ATP Estoril Qual | 2018/04/29 12:35 | Joao Monteiro v Stephane Robert | 6-3,6-7,7-6 |
| Challenger St Brieuc | 2018/03/29 12:45 | Stephane Robert v Constant Lestienne | 3-6,4-6 |
| Challenger St Brieuc | 2018/03/27 13:05 | Laurynas Grigelis v Stephane Robert | 4-6,6-7 |
| Challenger Lille | 2018/03/22 13:10 | Gregoire Barrere v Stephane Robert | 2-6,7-5,7-6 |
| Challenger Lille | 2018/03/20 15:00 | Aldin Setkic v Stephane Robert | 2-6,6-3,6-7 |
| Challenger Yokohama | 2018/03/02 03:45 | Jordan Thompson v Stephane Robert | 6-3,4-6,6-2 |
| Challenger Yokohama | 2018/03/01 02:00 | Daniel Nguyen v Stephane Robert | 5-7,0-6 |