Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| Challenger Irving Qual | 2018/03/12 17:30 | Arthur Rinderknech v Jonathan Chang | 6-1,6-4 |
| ITF Canada F2 Qual | 2018/03/04 15:00 | Deiton Baughman v Jonathan Chang | 6-1,6-1 |
| ITF Canada F2 Qual | 2018/03/03 15:00 | Jonathan Chang v Julian Zlobinsky | 6-4,3-6,3-6 |
| ITF Canada F1 | 2018/03/01 00:00 | Jonathan Chang v Frank Dancevic | 2-6,6-7 |
| ITF Canada F1 Qual | 2018/02/26 15:00 | Sem Verbeek v Jonathan Chang | 5-7,6-3,4-6 |
| ITF Canada F1 Qual | 2018/02/25 15:00 | Emmett Ward v Jonathan Chang | 2-6,4-6 |
| ITF Germany F3 Qual | 2018/01/28 13:00 | Nikolas Walterscheid-Tukic v Jonathan Chang | 6-7,6-4,7-6 |
| ITF Germany F2 Qual | 2018/01/21 13:00 | Tim Heger v Jonathan Chang | 7-6,6-4 |
| ITF Egypt F13 | 2018/04/08 10:30 | Gage Brymer v Brian Cernoch | 2-6,2-6 |
| ITF Egypt F13 | 2018/04/07 12:00 | Piotr Matuszewski v Gage Brymer | 0-6,2-6 |
| ITF Greece F5 | 2018/03/28 06:00 | Gage Brymer v Tomas Barrios Vera | 2-6,0-6 |
| ITF Greece F5 | 2018/03/26 07:00 | Valentin Guenther v Gage Brymer | 3-6,3-6 |
| ITF Greece F5 | 2018/03/25 08:00 | Gage Brymer v Andrej Glvac | 6-3,6-2 |
| ITF Greece F4 | 2018/03/21 08:00 | Lukas Klein v Gage Brymer | 7-5,6-4 |
| ITF Greece F3 | 2018/03/11 08:00 | Gage Brymer v Diego Matos | 6-7,5-7 |
| ITF Greece F3 | 2018/03/10 07:30 | Luke Johnson v Gage Brymer | 2-6,4-6 |