Stadium: Court 9 Round: 25
| Challenger Winnetka | 2018/07/13 19:20 | Jason Jung v Collin Altamirano | 6-2,6-2 |
| Challenger Winnetka | 2018/07/12 19:15 | Collin Altamirano v Mitchell Krueger | 6-4,6-4 |
| Challenger Winnetka | 2018/07/11 18:00 | Darian King v Collin Altamirano | 5-7,6-7 |
| 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 Great Britain F2 | 2017/02/05 14:30 | Will Davies v Joshua Paris | 3-6,6-3,6-7 |