Stadium: Court 5 Round: 26 Ground: Hardcourt outdoor
| Challenger Winnetka | 2018/07/10 20:55 | Darian King v Donald Young | 6-3,5-7,6-1 |
| Wimbledon Qual | 2018/06/25 10:00 | Alexander Ward v Darian King | 4-6,7-5,6-0 |
| Challenger Ilkley | 2018/06/22 14:50 | Darian King v Oscar Otte | 4-6,6-4,1-6 |
| Challenger Ilkley | 2018/06/20 13:00 | Sebastian Ofner v Darian King | 6-7,4-6 |
| Challenger Ilkley | 2018/06/18 14:05 | Darian King v Jack Draper | 6-4,6-2 |
| French Open Qual | 2018/05/21 15:05 | Bernard Tomic v Darian King | 7-6,6-0 |
| Challenger Leon | 2018/04/25 16:00 | Ante Pavic v Darian King | 6-4,6-2 |
| Challenger Leon | 2018/04/23 20:00 | Manuel Sanchez v Darian King | 4-6,6-7 |
| Challenger Winnetka | 2018/07/10 16:30 | Austin Krajicek v Collin Altamirano | 5-7,5-7 |
| Challenger Winnetka Qual | 2018/07/09 16:50 | Emil Reinberg v Collin Altamirano | 3-6,4-6 |
| Challenger Winnetka Qual | 2018/07/08 16:35 | Logan Smith v Collin Altamirano | 2-6,3-6 |
| Challenger Winnetka Qual | 2018/07/07 15:00 | Sam Riffice v Collin Altamirano | 6-7,6-3,4-6 |
| ITF USA F19 | 2018/07/05 17:30 | Collin Altamirano v Reese Stalder | 3-6,1-6 |
| ITF USA F19 | 2018/07/04 14:00 | Collin Altamirano v Samuel Beren | 6-2,6-3 |
| ITF USA F17 | 2018/06/26 19:00 | Collin Altamirano v Jeffrey John Wolf | 4-6,5-7 |
| ITF Singapore F2 | 2018/05/26 03:00 | Takuto Niki v Collin Altamirano | 6-7,3-6 |