Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF USA F19B Qual | 2018/07/16 18:50 | Alafia Ayeni v Roy Smith | 5-7,6-1,4-6 |
| ITF USA F19B Qual | 2018/07/15 15:00 | Alafia Ayeni v Josh Silverstein | 6-0,6-1 |
| Challenger Winnetka Qual | 2018/07/08 16:40 | Alafia Ayeni v Emil Reinberg | 6-3,4-6,5-7 |
| Challenger Winnetka Qual | 2018/07/07 15:00 | Jared Hiltzik v Alafia Ayeni | 3-6,6-7 |
| ITF Canada F3 | 2018/06/19 16:00 | Alafia Ayeni v Matt Seeberger | 6-0,6-7,5-7 |
| ITF China F8 | 2018/06/08 02:00 | Wishaya Trongcharoenchaikul v Alafia Ayeni | 6-4,1-6,6-3 |
| ITF China F8 | 2018/06/07 03:25 | Hanyi Liu v Alafia Ayeni | 1-6,4-6 |
| ITF China F8 | 2018/06/05 03:30 | Alafia Ayeni v Kento Takeuchi | 6-1,7-5 |
| ITF Germany F5 | 2018/06/27 15:25 | Filip Bergevi v Igor Sijsling | 6-1,6-2 |
| ITF Germany F5 | 2018/06/25 09:00 | Igor Sijsling v Jannik Rother | 6-1,6-3 |
| ITF Germany F5 | 2018/06/25 08:00 | Igor Sijsling v Quentin Folliot | 6-2,6-4 |
| Challenger Loughborough Qual | 2018/05/21 12:20 | Igor Sijsling v Jurij Rodionov | 6-7,3-6 |
| Challenger Loughborough Qual | 2018/05/20 14:30 | Igor Sijsling v Peter Bothwell | 6-4,6-2 |
| Challenger Loughborough Qual | 2018/05/19 17:20 | Igor Sijsling v Julian Ocleppo | 6-4,6-7,6-1 |
| Challenger Heilbronn | 2018/05/17 11:00 | Igor Sijsling v Jiri Vesely | 3-6,6-4,2-6 |
| Challenger Heilbronn Qual | 2018/05/14 11:00 | Miliaan Niesten v Igor Sijsling | 3-6,2-6 |