Stadium: C Round: 26 Ground: Clay
| Challenger Mestre | 2018/05/21 12:10 | Daniel Munoz-De La Nava v Scott Griekspoor | 1-6,2-6 |
| 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 |
| Challenger Mestre | 2018/05/21 12:10 | Andrea Basso v Danilo Petrovic | 6-2,1-6,3-6 |
| Challenger Puerto Vallarta | 2018/05/05 23:00 | Adrian Menendez-Maceiras v Danilo Petrovic | 1-6,7-5,6-3 |
| Challenger Puerto Vallarta | 2018/05/04 23:00 | Danilo Petrovic v Carlos Gomez-Herrera | 6-3,6-3 |
| Challenger Puerto Vallarta | 2018/05/03 21:00 | Danilo Petrovic v Ante Pavic | 6-3,6-2 |
| Challenger Puerto Vallarta | 2018/05/02 19:00 | Danilo Petrovic v Ugo Humbert | 6-4,3-6,6-3 |
| Challenger Puerto Vallarta | 2018/05/01 18:35 | Danilo Petrovic v Gonzalo Escobar | 6-3,1-6,6-2 |
| Challenger Leon | 2018/04/24 17:45 | Jose Hernandez-Fernandez v Danilo Petrovic | 6-3,4-6,6-4 |
| Challenger Guadalajara | 2018/04/20 22:00 | Danilo Petrovic v Christopher Eubanks | 4-6,4-6 |