Stadium: Centre Court Round: 28 Ground: Hardcourt outdoor
| ITF Canada F5 | 2018/07/06 17:00 | Marc-Andrea Huesler v Grills, Jacob | 6-3,0-6,5-7 |
| ITF Canada F5 | 2018/07/05 20:45 | Boulais, Justin v Grills, Jacob | 7-5,1-6,3-6 |
| ITF Canada F5 | 2018/07/03 16:00 | Maginley, J. v Grills, Jacob | 6-7,2-6 |
| ITF Singapore F3 | 2018/05/31 06:15 | Banes, Maverick v Grills, Jacob | 6-1,7-6 |
| ITF Singapore F3 | 2018/05/28 05:00 | Yu, Cheng-Yu v Grills, Jacob | 7-6,3-6,3-6 |
| ITF Singapore F2 | 2018/05/22 02:00 | Grills, Jacob v Kazuki Nishiwaki | 3-6,6-3,5-7 |
| Challenger Busan Qual | 2018/05/12 02:35 | Grills, Jacob v Renta Tokuda | 7-6,5-7,3-6 |
| Challenger Gimcheon Qual | 2018/05/06 07:10 | Yoshihito Nishioka v Grills, Jacob | 6-2,0-6,7-6 |
| ITF Canada F5 | 2018/07/06 19:40 | Volfson, David v Griffith, William | 6-7,6-2,3-6 |
| ITF Canada F5 | 2018/07/05 17:00 | Griffith, William v Wishaya Trongcharoenchaikul | 3-6,6-1,6-3 |
| ITF Canada F5 | 2018/07/04 00:45 | Griffith, William v Brymer, Gage | 6-2,1-6,6-4 |
| ITF Canada F5 Qual | 2018/07/02 16:00 | Griffith, William v Lunn, Justin | 6-0,6-1 |
| ITF Canada F5 Qual | 2018/06/30 16:00 | Justin Roberts v Griffith, William | 4-6,6-4,1-6 |
| ITF Canada F4 Qual | 2018/06/25 21:30 | Griffith, William v Bradley, Julian | 3-6,6-2,6-7 |
| ITF Canada F4 Qual | 2018/06/24 17:00 | Torres, Richard v Griffith, William | 3-6,1-6 |
| ITF Canada F4 Qual | 2018/06/23 17:00 | Ronald Hohmann v Griffith, William | 4-6,6-3,1-6 |